{"action":"create","ckan_id":null,"date_created":"Sat, 14 Feb 2026 20:46:21 GMT","date_finished":null,"harvest_job_id":"b099ff79-e0c0-4989-8abd-bd643fba622f","harvest_source_id":"31f41541-38a0-400b-b240-10ebcb0acd9a","id":"29c0c780-e7ac-4994-bbc5-2f710ff62ea8","identifier":"https://dggs.alaska.gov/webpubs/metadata/GPR2013-1.xml","parent_identifier":null,"source_hash":"d7b32916c67b291920c8c4daa557e51602ce79d044d4a8b2553cceefc84fe429","source_raw":"\n\n\n\n\nBurns, L.E.\nFugro Airborne Surveys Corp.\nFugro GeoServices, Inc.\n2013\nSouthern Dishna River, Fox Hills, and Beaver Creek survey areas: Airborne Magnetic and electromagnetic data in line (point), grid, vector, and map formats, Iditarod, Ophir, and Holy Cross quadrangles, western Alaska\nraster digital data, tabular digital data, and vector digital data\n\nGeophysical Report\nGPR 2013-1\n\n\nFairbanks, AK, USA\nState of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS)\n\n1 DVD, scale 1:63,360.\nhttp://dx.doi.org/10.14509/26701\nhttp://dggs.alaska.gov/pubs/gpdata/236\n\n\n\nThis digital publication, GPR 2013-1, contains data produced from airborne geophysical surveys conducted in 2012 for three separate blocks, the Southern Dishna River, Fox Hills, and Beaver Creek survey areas, in the Iditarod, Ophir, and Holy Cross quadrangles in western Alaska. The areas are in the Iditarod, Innoko, and Aniak mining districts. Aeromagnetic and electromagnetic (EM) data were acquired by helicopter for about 1029 sq miles. Fugro Airborne Survey's frequency-domain DIGHEM V system was used for the EM data. GPR 2013-1 includes (1) raw and processed linedata; (2) gridded, Google Earth, and Geotiff formats of the calculated linedata; (3) maps of the data; and (4) vector files of data contours and flight lines.\nThe survey was part of the Alaska Airborne Geophysical/Geological Mineral Inventory Program funded by the Alaska State Legislature and managed by State of Alaska, Department of Natural Resources (DNR), Division of Geological & Geophysical Surveys (DGGS). The program seeks to catalyze private-sector mineral development investment. The program delineates mineral zones on Alaska state lands that: 1) have major economic value; 2) can be developed in the short term to provide high quality jobs for Alaska; and 3) will provide economic diversification to help offset the loss of Prudhoe Bay oil revenue.\n\nThe airborne data were acquired and processed under contract between the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS), and Fugro GeoServices, Inc. Fugro Airborne Surveys (now CGG Airborne), the subcontractor, acquired and processed the data in 2012 and 2013. Ownership of Fugro Airborne Surveys was transferred to CGG Canada Services Ltd. during the course of this project. A future publication will include the technical project report, interpretation map, and EM anomalies, as well as other files.\nData acquisition, processing, and the type of products were all the same for the three surveys blocks. Unless mentioned by survey name, the term 'linedata files' pertains to the linedata files for southern Dishna River, Fox Hills, and Beaver Creek. The beginning part of the file names for grids, GeoTiffs, kmzs, and vector files are either 'Dish', 'Fox', or 'Bvr'. In this file, the initials 'XXX' will be used to indicate that except for the initial characters, the file names or methods of processing are identical for all areas.\nThis metadata file lists file names and definitions in the 'Entity_and_Attribute_Information' section. This information is also provided in the file 'gpr2013_001_readme.PDF'. Besides file names and definitions, the readme file contains map numbers and grid correlations, projection information, and much general information. Location figures are provided in the gpr2013_001_browsegraphic.pdf file and as jpegs in the main directory on the DVD version of this publication and with all downloads in the digital version. Some detailed information about the data is given in the 'Entity_and_Attribute_Information' section of this metadata file.\nThe file 'GPR2013_001_linedata.txt' gives information on the linedata in an easy-to-read format. All data are provided in NAD27, UTM zone 4N, except for Google Earth KMZ files, which are in Geographic Coordinate System (Simple Cylindrical projection) with a WGS84 datum. Besides NAD27, UTM zone 4N easting and northing coordinates, the linedata files also include latitude and longitude (Geographic Coordinate System with a WGS84 datum).\n\nThe bounding coordinates for all three surveys are given below in the 'Spatial_Domain Section'. The bounding coordinates for each survey block is given here.\n\nSOUTHERN DISHNA RIVER: (Iditarod and Ophir quadrangles)\n> West_Bounding_Coordinate: -157.92\n> East_Bounding_Coordinate: -156.89\n> North_Bounding_Coordinate: 63.14\n> South_Bounding_Coordinate: 62.53\nFOX HILLS: (Holy Cross and Iditarod quadrangles)\n> West_Bounding_Coordinate: -159.35\n> East_Bounding_Coordinate: -158.59\n> North_Bounding_Coordinate: 62.30\n> South_Bounding_Coordinate: 62.14\nBEAVER CREEK: (Iditarod quadrangle)\n> West_Bounding_Coordinate: -157.71\n> East_Bounding_Coordinate: -157.16\n> North_Bounding_Coordinate: 62.53\n> South_Bounding_Coordinate: 62.25\n\n\n\n\n\n201209\n201311\n\n\npublication date\n\n\nComplete\nNone\n\n\n\n-159.35\n-156.89\n63.14\n62.14\n\n\n\n\nISO 19115 Topic Category\ngeoscientificInformation\n\n\nnone\nAeromagnetic Data\nAeromagnetic Map\nAeromagnetic Survey\nAirborne Geophysical Survey\nApparent Resistivity Data\nApparent Resistivity Map\nDigital Elevation Model\nDIGHEM V EM System\nElectromagnetic Data\nElectromagnetic Survey\nFirst Vertical Derivative\nGeophysics\nHEM Survey\nMagnetic Survey\nMagnetics\n\n\nnone\nAlaska, State of\nAniak Mining District\nHoly Cross Quadrangle\nIditarod Mining District\nIditarod Quadrangle\nInnoko Mining District\nOphir Quadrangle\n\n\nThis report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below).\nAny hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.\n\ngpr2013_001_browsegraphic.pdf\nThe browse graphic file contains three location maps showing 1) survey areas and adjacent published surveys within Alaska, 2) survey areas on 1:250,000 USGS quadrangles, and 3) boundaries of the map sheets.\nPDF\n\nFunding was provided by the Alaska State Legislature the DGGS Airborne Geophysical/Geological Mineral Inventory (AGGMI) program.\nMicrosoft Windows 7 Professional Version 2009 Service Pack 1; Geosoft Oasis Montaj Version 7.3; Autocad Version 2000; ESRI Shape file format; MapInfo Professional file format; ER Mapper; Adobe Acrobat Distiller v9.0; Adobe Acrobat Professional v9.0; Fugro Airborne Survey proprietary software\n\n\nBurns, L.E.\nFugro Airborne Surveys Corp.\nFugro GeoServices, Inc.\n2011\nIditarod survey area: Magnetic and electromagnetic line, grid, and vector data and maps, Innoko, Iditarod, and McGrath mining districts, Iditarod and Ophir quadrangles, western Alaska\nraster digital data, tabular digital data, vector digital data\n\nGeophysical Report\nGPR 2011-2\n\n\nFairbanks, AK, USA\nState of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS)\n\n1 DVD\nhttp://dx.doi.org/10.14509/22842\nhttp://dggs.alaska.gov/pubs/gpdata/155\n\n\n\n\nBurns, L.E.\nStevens Exploration Management Corp.\nFugro Airborne Surveys Corp.\n2000\nDVD containing profile data, gridded data, vector data, and location information of 2000 geophysical survey data for parts of the Aniak and Iditarod mining districts, southwestern Alaska\nraster digital data, tabular digital data, vector digital data\n\nGeophysical Report\nGPR 2000-38\n\n\nFairbanks, AK, USA\nState of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS)\n\n1 DVD\nhttp://dx.doi.org/10.14509/2721\nhttp://dggs.alaska.gov/pubs/gpdata/60\n\n\n\n\nStevens, Mark\nFugro Airborne Surveys Corp.\n2000\nProject report of the geophysical survey of parts of the Aniak and Iditarod mining districts, southwestern Alaska:\n\nGeophysical Report\nGPR 2000-40\n\n\nFairbanks, AK, USA\nState of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS)\n\n1 DVD\nhttp://dx.doi.org/10.14509/2723\nhttp://dggs.alaska.gov/pubs/gpdata/60\n\n\n\n\nBurns, L.E.\nFugro Airborne Surveys Corp.\nFugro GeoServices, Inc.\n2011\nIditarod survey area: Magnetic and electromagnetic line, grid, and vector data and maps, Innoko, Iditarod, and McGrath mining districts, Iditarod and Ophir quadrangles, western Alaska\nraster digital data, tabular digital data, vector digital data\n\nGeophysical Report\nGPR 2011-2\n\n\nFairbanks, AK, USA\nState of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (DGGS)\n\n1 DVD\nhttp://dx.doi.org/10.14509/22842\nhttp://dggs.alaska.gov/pubs/gpdata/155\n\n\n\n\n\nSurvey contracts specified the conditions and specifications under which these data were collected. Altimeter, heading, lag, and frequent EM calibrations were done. More information will be available in the project report to be published in the future.\n\nData for this survey were collected by a single subcontractor (Fugro Airborne Surveys) who was responsible for collecting and processing the data.\nThe linedata files have very few missing values. More information is in 'gpr2013_001_linedata.txt'.\n\n\nThe helicopter position was derived every 0.5 seconds using post-flight differential positioning to an accuracy of better than 1 m.\n\n\nThe laser altimeter ('ALTLAS_BIRD'), located in the bird (EM equipment and magnetometer housing), had a stated resolution of 0.10 meter. The ALTLAS_BIRD value may be unreliable over bodies of water where the laser returns are scattered.\n\n\n\n\n\n\nAkima, H.\n1970\nA new method of interpolation and smooth curve fitting based on local procedures\n\nJournal of the Association of Computing Machinery\nv. 7, no. 4\n\nNone\n\n\npaper\n\n\n\n1970\n\n\n1970\n\nAkima, 1970\nFugro Airborne Surveys used a modification of this method while making grids.\n\n\n\n\nFraser, D.C.\n1978\nResistivity mapping with an airborne multicoil electromagnetic system\n\nGeophysics\nv. 43\n\nNone\n\n\npaper\n\n\n\n1978\n\n\n1978\n\nFraser, 1978\nFugro Airborne Surveys used this method for calculating apparent depth and apparent resistivity.\n\n\n\n\nAlaska Department of Natural Resources - Land Records Information Section\n1995\nAlaska PLSS Section Grid\nvector digital data\n\nhttp://mapper.landrecords.info/ (Anchorage, Alaska)\nState of Alaska, Department of Natural Resources, Division, Land Records Information Section (LRIS)\n\nESRI shape file format\nhttp://dnr.alaska.gov/SpatialUtility/SUC?cmd=vmd&layerid=45 (metadata)\n\n\nonline\n\n\n\n1950\n1998\n\n\n2008\n\nADNR-LRIS, 1995\nThe downloaded section grid file, built from original protraction diagram data, was used as a starting point for the section grid digital file included in GPR 2013-1. Minor formatting modifications were made to the file. The section grid is used on the maps without topography and is provided in digital format in this publication. The ending date for content, given above, reflects the current metadata file for the Alaska PLSS Section Grid.\n\n\n\nThe airborne geophysical data were acquired between September 15th to November 2nd, 2012, with about three more days spent in each of the beginning and end of the survey. An Aerospatiale AS350B2 helicopter, was used for this survey, and was on October 23rd, 2012 it was joined by an Aerospatiale AS350B3 helicopter. Two DIGHEM (V) Electromagnetic (EM) systems and two airborne Scintrex CS3 cesium magnetometer sensors were used. The EM and magnetic sensors were flown at a height of 100 feet, with the magnetic sensor installed in the EM bird. In addition, the survey recorded data from radar and laser altimeters, GPS navigation system, 50/60 Hz monitors, and video camera.\n>\nFlights were performed with the Aerospatiale AS-350-B2 helicopter for the Dishna area and most of the Beaver Creek area. The Aerospatiale AS-350-B3 helicopter was used for the Fox Hills area and one of the flights in the Beaver Creek survey area. Further information is in the linedata 'Entity_Attribute' sections. The helicopters were flown at a mean terrain clearance of 200 feet (61 m) on a heading of N20W (a heading of 160 degrees) for the flight lines for all the areas. Line spacing was one-quarter mile (402.3 m). Tie lines were flown on a heading of 70 degrees, perpendicular to the flight lines, and were spaced at intervals of approximately 3 miles (4,828 m).\n>\nNovatel OEM4-G2L Global Positioning Systems were used for navigation and flight path recovery. The helicopter positions were derived every 0.5 seconds (2 Hz); the ground GPS base station data were collected at 1.0 second (1 Hz) intervals. The use of the differentially-corrected base station data results in a positional accuracy of better than five meters. The positional xy data are interpolated from 2 Hz to 10 Hz. Flight path positions were projected onto the Clarke 1866 (UTM zone 4N) spheroid, 1927 North American datum using a central meridian (CM) of 159 degrees, a north constant of 0, and an east constant of 500,000.\n\n2012\n\n\nThe total magnetic field data were acquired with a sampling interval of 0.1 seconds. Data are contained in channels in the linedata files 'SDishnaRiver', 'FoxHills', and 'BeaverCrk'. All channels mentioned in this document are included in all three databases. Any mention of a channel applies to that channel in all the linedatat files. The spike-rejected raw magnetic data (channel 'mag_raw') were (1) corrected for measured system lag (resulting in the channel 'mag_lag'), (2) corrected for diurnal variations by subtraction of the digitally recorded base station magnetic data (resulting in the channel 'mag_diu'), (3) adjusted for regional variations (by subtracting IGRF model 2010, updated for date of flight and elevation variations), (4) leveled to the tie line data resulting in the final residual magnetic intensity (resulting in channel 'mag_rmi'),(5) manually leveled with final small microleveling, and (6) increased by a constant IGRF average value to restore the mag_rmi values to a total magnetic field channel (resulting in channel 'magIGRF'). Channels 'mag_rmi and 'magIGRF' were then interpolated onto a regular 80-m grid using a modified Akima (1970) technique.\nAkima, 1970\n2012\n\n\n\nThree different algorithms were applied to the total magnetic field 80 m grid, resulting in three magnetic derivative grids. The analytic signal grid (XXX_ASig, where 'XXX' is replaced by 'Dish', 'Fox', and 'Bvr' in the data files) is the total amplitude of all directions of magnetic gradient calculated from the sum of the squares of the three orthogonal gradients. Mapped highs in the calculated analytic signal of the magnetic parameter locate the anomalous source body edges and corners (e.g., contacts, fault/shear zones, basement fault block boundaries or lithologic contacts, etc.). Analytic signal maxima are located directly over faults and contacts, regardless of structural dip, and independently of the direction of the induced and/or remanent body magnetizations.\n>\nThe calculated magnetic tilt grid (XXX_TiltDer) is the angle between the horizontal gradient and the total vertical gradient, and is useful for identifying the depth and type of magnetic source. The tilt angle is positive over the source, crosses through zero at, or near, the edge of a vertical sided source, and is negative outside the source zone. It has the added advantage of responding equally well to shallow and deep sources and is able to resolve deeper sources that may be masked by larger responses caused by shallower sources.\n>\nThe first vertical derivative grid was calculated using a fast Fourier transform (FFT) based frequency-domain filtering algorithm. The vertical gradient algorithm enhances the response of magnetic bodies in the upper 500 m and attenuates the response of deeper bodies. The resulting (calculated) vertical gradient grid (XXX_1VD) provides better definition and resolution of near-surface magnetic units and helps to identify weak magnetic features that may not be evident in the total field data.\n>\nAll magnetic and derivative derivative magnetic grids were then resampled from the 80-m cell size down to a 25-m cell size using a modified Akima (1970) technique to produce the maps and final grids contained in this publication. When resampling the grids to a 25-m cell size, the original grids are scanned to determine the minimum and maximum values which the new grids are then limited to, avoiding extreme extrapolation errors between lines.\n\nAkima, 1970\n2013\n\n\n\nTwo DIGHEM (V) EM systems were used on this project. Each measured inphase and quadrature components at five frequencies. The DIGHEM(V) BKS51 system, associated with the AS350B2 helicopter, used two vertical coaxial-coil pairs which operated at 1115 (1000) and 5482 (5500) Hz while three horizontal coplanar-coil pairs operated at 921 (900), 7279 (7200), and 56,320 (56,000) Hz. The DIGHEM(V) BKS54 system, associated with the AS350B3 helicopter, used two vertical coaxial-coil pairs which operated at 1115 (1000) and 5741 (5500) Hz while three horizontal coplanar-coil pairs operated at 884 (900), 7077 (7200), and 56,150 (56,000) Hz.\n>\nEM data were sampled at 0.1 second intervals. The EM system responds to bedrock conductors, conductive overburden, and cultural sources. The EM inphase and quadrature data were drift corrected using base level data collected at high altitude (areas of no signal). Along-line filters are applied to the data to remove spheric spikes. The data were inspected for variations in phase, and a phase correction was applied to the data if necessary.\n>\nThe apparent resistivity and apparent depth were then calculated from the inphase and quadrature data for all coplanar frequencies. The calculation used the pseudo-layer (or buried) half-space model defined by Fraser (1978). This model consists of a resistive layer overlying a conductive half-space (or pseudo-layer). The apparent depth is defined as the sensor-source distance minus the measured altitude of the sensor above the ground. The apparent depth channels estimate the depth of a conductive half-space. The calculated apparent depth is the depth to the top of this conductive layer. The apparent depth (or thickness) parameter will be positive when the upper layer is more resistive than the underlying material, in which case the apparent depth may be quite close to the true depth, assuming it is a buried half-space and the altimeter is correct. The apparent depth will be negative when the upper layer is more conductive than the underlying material, and will be zero when a homogeneous half-space exists. The apparent depth parameter must be interpreted cautiously because it will contain any errors that might exist in the measured altitude of the EM bird (e.g., as caused by a dense tree cover). Manual leveling of the inphase and quadrature of each coil pair, based on the resistivity data and comparisons to the data from the other frequencies, was performed. Automated micro-leveling is carried out in areas of low signal.\n>\nThe EM data were interpolated onto a regular 80-m grid using a modified Akima (1970) technique. The resulting grids were subjected to a 3x3 Hanning filter and resampled to a 25-m cell size before contouring and map production. When resampling the grids to a 25-m cell size, the original grids are scanned to determine the minimum and maximum values which the new grids are then limited to, avoiding extreme extrapolation errors between lines.\n\nAkima, 1970\n2013\n\n\nThe digital elevation/terrain model was produced from the differentially corrected GPS-Z data (channel 'GPSZ' in linedata files) and the laser altimeter data measured in the bird (channel 'ALTLAS_BIRD' in linedata). Both the GPSZ and ALTLAS_BIRD data were checked for spikes, which were removed manually. The ALTLAS_BIRD data were despiked and then filtered using a 13 median filter, followed by a 13 Hanning filter. The corrected altimeter was then subtracted from the GPSZ data to produce profiles of the height above mean sea level along the survey lines. The data were manually leveled to remove any errors between lines. After all leveling, the data were DC shifted to match the local maps, in this case, NAD27. The 80-m DTM grid was then resampled to a 25-m cell size to produce the DTM grid contained in this publication. When resampling the grids to a 25-m cell size, the original grids are scanned to determine the minimum and maximum values which the new grids are then limited to, avoiding extreme extrapolation errors between lines.\n2013\n\n\nDGGS downloaded the Alaska PLSS Section Grid shapefile in December 2012 and cut the file to roughly fit the map sheets for this publication using MapInfo Professional. Fugro Airborne Surveys modified the formatting of the file using AutoCad, changing township and range line widths and colors, and added township and range labels. The modified file was then used as overlays on maps without topography.\nADNR-LRIS, 1995\n2012\n\n\nThe HPGL/2 files were created with HP Designjet 5000 printer driver v5.32 and plot on some plotters, but not all plotters correctly. The Adobe Acrobat format files were created with Adobe Acrobat Distiller v9.0 from Postscript files.\n2013\n\n\n\n\n\n\n\nUniversal Transverse Mercator\n\n4\n\n0.9996\n-159\n0\n500000\n0\n\n\n\n\nrow and column\n\n25\n25\n\nmeters\nGrids\n\n\n\nNorth American Datum of 1927\nClarke 1866\n6378206.4\n294.978698\n\n\n\n\n\n\nSDishna_linedataAsGDB.zip and SDishna_linedataAsXYZ.zip\nThe southern Dishna River files in the Linedata folder contain raw and processed linedata and related calculated fields for locational, magnetic, and electromagnetic data. The linedata files are provided in both Geosoft binary GDB and Geosoft ASCII XYZ formats; formatting varies slightly between these. Except for the 'LINE' and 'TYPE' (of line) information, all attributes, including 'DATE' and 'FLIGHT', are represented by one of the 50 data columns on each record. The 'LINE' and 'TYPE' attributes are discussed further in the attribute 'ID Cell'.\nL.E. Burns & Fugro Airborne Surveys\nLINEDATA\n\n\nID_CELL\n\nIn the Geosoft software 'Oasis Montaj', information about the flight lines in the linedata file is shown in an unlabeled 'ID CELL' in the spreadsheet window. The format of the ID cell is 'TYPE LineNumber:Flight (Designator or Identifier), where TYPE refers to the type of flight line, LineNumber refers to the actual numbered line flown, and flight designator provides the data acquisition system identifier and the flight number. The 'ID CELL' content, particularly combined with the definitions below for this particular survey, provides information about the flight line layout. The 'Flight' designator is discussed below in more detail as an 'Attribute'.\nEach ID-cell value will have an associated spreadsheet view consisting of a column for each of the 50 attributes for a particular line number. In the XYZ file, the 'LINE' and 'FLIGHT' attributes and the 'DATE' are present as header lines, one attribute per line, before each set of associated data, for example:\n\n> //Flight 3053\n> //Date 2012/10/27\n> Line 40010\n> Followed by all records for points sampled along Line 40010.\n> (Pattern is repeated for each line number).\n\nL.E. Burns & Fugro Airborne Surveys\n\n\nLINE TYPES and SYMBOLS:\n> Traverse lines - oriented nominally N20W (heading of 160 degrees)\n> Tie lines - oriented nominally N70E (heading of 70 degrees)\n> Border lines - present inside and parallel to the survey\n> tract border where traverse or tie lines\n> are not parallel to the border.\n> Traverse lines - 'L' (GDB file); 'LINE' (XYZ file).\n> Tie and border lines - 'T' (GDB file); 'TIE' (XYZ file).\n\nLINE NUMBERS\n> Planned flight lines increase by 10 in a consistent fashion.\n> For this project, traverse line numbers increase from SW to\n> NE; tie line numbers increase from north to south; and\n> border line numbers increase in a clockwise direction.\n\n> When more than one uninterrupted flight traverse was needed\n> to complete a planned flight line, the fifth digit of the line\n> number is increased by '1' for each new flight segment/version.\n\n> MAIN LINE NUMBERS:\n> Dishna\n> Lowest Traverse lines (SW): L40010\n> Highest Traverse lines (NE): L41790\n> Lowest Tie Lines: T49010\n> Highest Tie Lines: T49110\n> Lowest Border Lines: T49121\n> Highest Border Lines: T49230\n\n\n\n\nx_NAD27z4N\neasting NAD 27 (UTM Zone 4)\nFugro Airborne Surveys\n\n\n554519.62\n608487.07\nm\n\n\n\n\ny_NAD27z4N\nnorthing NAD 27 (UTM Zone 4)\nFugro Airborne Surveys\n\n\n6935056.42\n7000987.44\nm\n\n\n\n\nfid\nFiducial increment; the time in tenths of seconds from the start to the end of the particular flight.\nFugro Airborne Surveys\n\nThe attribute measurement resolution is 0.1 second. The values increase from the beginning of a flight to the end. Only FIDs during production flights are included in the database.\n\n\n\nlat_WGS84\nlatitude WGS 84\nFugro Airborne Surveys\n\n\n62.5435090\n63.1237402\ndegrees\n\n\n\n\nlon_WGS84\nlongitude WGS 84\nFugro Airborne Surveys\n\n\n-157.9406338\n-156.8546699\ndegrees\n\n\n\n\nflight\nThe flight designator is composed of Fugro\u00ef\u00bf\u00bds identification number of the HeliDAS (data acquisition system) used and the flight number. For the Southern Dishna block, three HeliDAS systems were used. The flight number, numbered sequentially for each helicopter, denotes a particular flight of that helicopter from home base to home base. Only flights that acquired final raw data for the survey are in the linedata files.\nFugro Airborne Surveys\n\nOne helicopter (B-2) was used for the Dishna block. Helidas 13 was used for the first Dishna flight ('005') that acquired data. Helidas 3 acquired all remaining data for the Dishna survey. Values in the linedata channel for the Dishna survey include 13005, and an intermittent sequence from 3015 to 3054.\n\n\n\ndate\nrange of flight dates (yyyy/mm/dd) for production flights of the southern Dishna River survey\nFugro Airborne Surveys\n\n\n2012/09/15\n2012/10/28\nday\n\n\n\n\naltrad_calcbird\ncalculated bird height above surface to simulate location of radar altimeter in the bird; radar altimeter measurement was recorded in helicopter. Altrad_calcbird was calculated by subtracting constant from which represented distance in altitude from helicopter to the bird when towing and recording data.\nFugro Airborne Surveys\n\n\n12.97\n112.62\nm\n\n\n\n\naltlas_bird\nbird height above surface, measured by laser altimeter in the EM bird\nFugro Airborne Surveys\n\n\n8.03\n116.43\nm\n\n\n\n\ngpsz\nbird height above spheroid. The GPSZ (or GPS-Z) value is primarily dependent on the number of available satellites. Although post-processing of GPS data will yield X and Y accuracies on the order of 1 meter, the accuracy of the Z value is usually much less, sometimes in the +/-20 meter range.\nFugro Airborne Surveys\n\n\n102.58\n777.20\nm\n\n\n\n\ndtm\ndigital terrain model (NAD27 UTM zone 7); calculated from channel 'GPS-Z' and the laser data (channel 'ALTLAS_BIRD') measured in the bird\nFugro Airborne Surveys\n\n\n32.43\n721.05\nm\n\n\n\n\ndiurnal_filt\nmeasured diurnal ground magnetic intensity; interpolated to 0.1 sec. from 1.0 second measurements\nFugro Airborne Surveys\n\n\n55468.28\n55819.14\nnT\n\n\n\n\ndiurnal_cor\ndiurnal correction - base removed; calculated from interpolated diurnal_filt\nFugro Airborne Surveys\n\n\n-86.08\n138.91\nnT\n\n\n\n\nmag_raw\ntotal magnetic field - spike rejected\nFugro Airborne Surveys\n\n\n54303.22\n60885.57\nnT\n\n\n\n\nmag_lag\ntotal magnetic field - corrected for lag\nFugro Airborne Surveys\n\n\n54303.22\n60885.57\nnT\n\n\n\n\nmag_diu\ntotal magnetic field - diurnal variation removed\nFugro Airborne Surveys\n\n\n54343.65\n60881.77\nnT\n\n\n\n\nigrf\ninternational geomagnetic reference field\nFugro Airborne Surveys\n\n\n55606.03\n55862.19\nnT\n\n\n\n\nmag_rmi\nresidual magnetic intensity - IGRF removed, then leveled - final\nFugro Airborne Surveys\n\n\n-1432.81\n5102.29\nnT\n\n\n\n\nmagigrf\ntotal magnetic field with IGRF removed - mag_rmi with constant added back - final\nFugro Airborne Surveys\n\n\n54292.09\n60821.19\nnT\n\n\n\n\ncpi900_FILT\ncoplanar inphase 900 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-1007.05\n773.44\nppm\n\n\n\n\ncpq900_FILT\ncoplanar quadrature 900 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-12.75\n728.68\nppm\n\n\n\n\ncxi1000_FILT\ncoaxial inphase 1000 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-241.98\n208.21\nppm\n\n\n\n\ncxq1000_FILT\ncoaxial quadrature 1000 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-3.98\n184.01\nppm\n\n\n\n\ncxi5500_FILT\ncoaxial inphase 5500 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-209.99\n384.65\nppm\n\n\n\n\ncxq5500_FILT\ncoaxial quadrature 5500 Hz -unlevelled\nFugro Airborne Surveys\n\n\n-19.84\n260.49\nppm\n\n\n\n\ncpi7200_FILT\ncoplanar inphase 7200 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-760.45\n1421.43\nppm\n\n\n\n\ncpq7200_FILT\ncoplanar quadrature 7200 Hz -unlevelled\nFugro Airborne Surveys\n\n\n-39.46\n1101.60\nppm\n\n\n\n\ncpi56K_FILT\ncoplanar inphase 56 kHz - unlevelled\nFugro Airborne Surveys\n\n\n-556.54\n2120.97\nppm\n\n\n\n\ncpq56K_FILT\ncoplanar quadrature 56 kHz - unlevelled\nFugro Airborne Surveys\n\n\n-68.12\n3306.84\nppm\n\n\n\n\ncpi900\ncoplanar inphase 900 Hz\nFugro Airborne Surveys\n\n\n-1006.94\n773.73\nppm\n\n\n\n\ncpq900\ncoplanar quadrature 900 Hz\nFugro Airborne Surveys\n\n\n0.32\n728.56\nppm\n\n\n\n\ncxi1000\ncoaxial inphase 1000 Hz\nFugro Airborne Surveys\n\n\n-244.43\n206.60\nppm\n\n\n\n\ncxq1000\ncoaxial quadrature 1000 Hz\nFugro Airborne Surveys\n\n\n-1.77\n184.40\nppm\n\n\n\n\ncxi5500\ncoaxial inphase 5500 Hz\nFugro Airborne Surveys\n\n\n-213.27\n385.23\nppm\n\n\n\n\ncxq5500\ncoaxial quadrature 5500 Hz\nFugro Airborne Surveys\n\n\n-6.07\n260.63\nppm\n\n\n\n\ncpi7200\ncoplanar inphase 7200 Hz\nFugro Airborne Surveys\n\n\n-761.23\n1421.56\nppm\n\n\n\n\ncpq7200\ncoplanar quadrature 7200 Hz\nFugro Airborne Surveys\n\n\n4.72\n1101.58\nppm\n\n\n\n\ncpi56k\ncoplanar inphase 56k Hz\nFugro Airborne Surveys\n\n\n-561.87\n2121.18\nppm\n\n\n\n\ncpq56K\ncoplanar quadrature 56k Hz\nFugro Airborne Surveys\n\n\n12.35\n3306.77\nppm\n\n\n\n\nres900\napparent resistivity 900 Hz; cut-off value for apparent resistivity was 1325; more information in process steps\nFugro Airborne Surveys\n\n\n0.30\n1325\nohm\u00ef\u00bf\u00bdm\n\n\n\n\nres7200\napparent resistivity 7200 Hz; cut-off value for apparent resistivity was 10750; more information in process steps\nFugro Airborne Surveys\n\n\n1.67\n10750\nohm\u00ef\u00bf\u00bdm\n\n\n\n\nres56K\napparent resistivity 56k Hz; cut-off value for apparent resistivity was 60000; more information in process steps\nFugro Airborne Surveys\n\n\n7.01\n15710.22\nohm\u00ef\u00bf\u00bdm\n\n\n\n\ndep900\napparent depth 900 Hz; more information in process steps\nFugro Airborne Surveys\n\n\n-72.51\n319.96\nm\n\n\n\n\ndep7200\napparent depth 7200 Hz; more information in process steps\nFugro Airborne Surveys\n\n\n-57.42\n70.74\nm\n\n\n\n\ndep56K\napparent depth 56k Hz; more information in process steps\nFugro Airborne Surveys\n\n\n-45.56\n19.94\nm\n\n\n\n\ndifi\ndifference channel based on cxi5500 & cpi7200\nFugro Airborne Surveys\n\n\n-64.00\n104.15\nunitless\n\n\n\n\ndifq\ndifference channel based on cxq5500 & cpq7200\nFugro Airborne Surveys\n\n\n-45.19\n105.26\nunitless\n\n\n\n\ncppl\ncoplanar powerline monitor\nFugro Airborne Surveys\n\n\n0.00\n1.52\nunitless\n\n\n\n\ncxsp\ncoaxial spherics monitor\nFugro Airborne Surveys\n\n\n0.00\n0.04\nunitless\n\n\n\n\ncpsp\ncoplanar spherics monitor\nFugro Airborne Surveys\n\n\n0.00\n0.23\nunitless\n\n\n\n\n\n\nFoxHills_linedata_asGDB.zip and Fox Hills_linedata_asXYZ.zip\nThe Fox Hills files in the Linedata folder contain raw and processed linedata and related calculated fields for locational, magnetic, and electromagnetic data. Linedata is provided in Geosoft binary grid (GRD) and Geosoft ASCII XYZ (XYZ) formats; formatting varies slightly between these. Except for the 'LINE' and 'TYPE' (of line) information, all attributes, including 'DATE' and 'FLIGHT', are represented by one of the 50 data columns on each record. The 'LINE' and 'TYPE' attributes are discussed further in the attribute 'ID Cell'.\nL.E. Burns & Fugro Airborne Surveys\nLINEDATA\n\n\nID_CELL\n\nIn the Geosoft software 'Oasis Montaj', information about the flight lines in the linedata file is shown in an unlabeled 'ID CELL' in the spreadsheet window. The format of the ID cell is 'TYPE LineNumber:Flight (Designator or Identifier), where TYPE refers to the type of flight line, LineNumber refers to the actual numbered line flown, and flight designator provides the data acquisition system identifier and the flight number. The 'ID CELL' content, particularly combined with the definitions below for this particular survey, provides information about the flight line layout. The 'Flight' designator is discussed below in more detail as an 'Attribute'.\nEach ID-cell value will have an associated spreadsheet view consisting of a column for each of the 50 attributes for a particular line number. In the XYZ file, the 'LINE' and 'FLIGHT' attributes and the 'DATE' are present as header lines, one attribute per line, before each set of associated data, for example:\n>\n> //Flight 4094\n> //Date 2012/10/24\n> Line 60010\n> Followed by all records for points sampled along Line 60010.\n> (Pattern is repeated for each line number).\n\nL.E. Burns & Fugro Airborne Surveys\n\n\nLINE TYPES and SYMBOLS:\n> Traverse lines \u00ef\u00bf\u00bd oriented nominally N20W (heading of 160 degrees)\n> Tie lines - oriented nominally N70E (heading of 70 degrees)\n> Border lines - present inside and parallel to the survey\n> tract border where traverse or tie lines\n> are not parallel to the border.\n> Traverse lines \u00ef\u00bf\u00bd 'L' (GDB file); 'LINE' (XYZ file).\n> Tie and border lines - 'T' (GDB file); 'TIE' (XYZ file).\n\nLINE NUMBERS\n> Planned flight lines increase by 10 in a consistent fashion.\n> For this project, traverse line numbers increase from SW to\n> NE; tie line numbers increase from north to south; and\n> border line numbers increase in a clockwise direction.\n>\n> When more than one uninterrupted flight traverse was needed\n> to complete a planned flight line, the fifth digit of the line\n> number is increased by '1' for each new flight segment/version.\n\nMAIN LINE NUMBERS:\n> FoxHills\n> Lowest Traverse lines(SW): L60010\n> Highest Traverse lines(NE): L61000\n> Lowest Tie Lines: T69010\n> Highest Tie Lines: T69050\n> Lowest Border Lines: T69060\n> Highest Border Lines: T69160\n\n\n\n\nx_NAD27z4N\neasting NAD 27 (UTM Zone 4)\nFugro Airborne Surveys\n\n\n481681.92\n521307.60\nm\n\n\n\n\ny_NAD27z4N\nnorthing NAD 27 (UTM Zone 4)\nFugro Airborne Surveys\n\n\n6889631.32\n6907110.22\nm\n\n\n\n\nfid\nFiducial increment; the time in tenths of seconds from the start to the end of the particular flight.\nFugro Airborne Surveys\n\nThe attribute measurement resolution is 0.1 second. The values increase from the beginning of a flight to the end. Only FIDs during production flights are included in the database.\n\n\n\nlat_WGS84\nlatitude WGS 84\nFugro Airborne Surveys\n\n\n62.1397998\n62.2961265\ndegrees\n\n\n\n\nlon_WGS84\nlongitude WGS 84\nFugro Airborne Surveys\n\n\n-159.3545631\n-158.5917447\ndegrees\n\n\n\n\nflight\nThe flight designator is composed of Fugro\u00ef\u00bf\u00bds identification number of the HeliDAS (data acquisition system) used and the flight number. For the Fox Hills block, one helicopter using HeliDAS '4' was the only one used. Only flights that acquired final raw data for the survey are in the linedata files.\nFugro Airborne Surveys\n\n\n4090\n4098\nflight\n\n\n\n\ndate\nrange of flight dates (yyyy/mm/dd) for production flights\nFugro Airborne Surveys\n\n\n2012/10/24\n2012/10/27\nday\n\n\n\n\naltrad_calcbird\ncalculated bird height above surface to simulate location of radar altimeter in the bird; radar altimeter measurement was recorded in helicopter. Altrad_calcbird was calculated by subtracting constant from which represented distance in altitude from helicopter to the bird when towing and recording data.\nFugro Airborne Surveys\n\n\n22.59\n78.55\nm\n\n\n\n\naltlas_bird\nbird height above surface, measured by laser altimeter in the EM bird\nFugro Airborne Surveys\n\n\n21.13\n78.42\nm\n\n\n\n\ngpsz\nbird height above spheroid. The GPSZ (or GPS-Z) value is primarily dependent on the number of available satellites. Although post-processing of GPS data will yield X and Y accuracies on the order of 1 meter, the accuracy of the Z value is usually much less, sometimes in the +/-20 meter range.\nFugro Airborne Surveys\n\n\n60.50\n602.35\nm\n\n\n\n\ndtm\ndigital terrain model (NAD27 UTM zone 4); calculated from channel 'GPS-Z' and the laser data (channel 'ALTLAS_BIRD') measured in the bird '\nFugro Airborne Surveys\n\n\n26.48\n562.93\nm\n\n\n\n\ndiurnal_filt\nmeasured diurnal ground magnetic intensity; interpolated to 0.1 sec. from 1.0 second measurements\nFugro Airborne Surveys\n\n\n55582.01\n55597.00\nnT\n\n\n\n\ndiurnal_cor\ndiurnal correction - base removed; calculated from interpolated diurnal_filt\nFugro Airborne Surveys\n\n\n-10.59\n4.40\nnT\n\n\n\n\nmag_raw\ntotal magnetic field - spike rejected\nFugro Airborne Surveys\n\n\n52388.49\n57441.22\nnT\n\n\n\n\nmag_lag\ntotal magnetic field - corrected for lag\nFugro Airborne Surveys\n\n\n52388.49\n57441.22\nnT\n\n\n\n\nmag_diu\ntotal magnetic field - diurnal variation removed\nFugro Airborne Surveys\n\n\n52392.67\n57445.93\nnT\n\n\n\n\nigrf\ninternational geomagnetic reference field\nFugro Airborne Surveys\n\n\n55388.72\n55473.76\nnT\n\n\n\n\nmag_rmi\nresidual magnetic intensity - IGRF removed, then leveled - final\nFugro Airborne Surveys\n\n\n-3062.14\n1976.96\nnT\n\n\n\n\nmagigrf\ntotal magnetic field with IGRF removed - mag_rmi with constant added back - final\nFugro Airborne Surveys\n\n\n52362.96\n57401.53\nnT\n\n\n\n\ncpi900_FILT\ncoplanar inphase 900 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-96.11\n717.82\nppm\n\n\n\n\ncpq900_FILT\ncoplanar quadrature 900 Hz - unlevelled\nFugro Airborne Surveys\n\n\n0.61\n541.30\nppm\n\n\n\n\ncxi1000_FILT\ncoaxial inphase 1000 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-27.54\n142.87\nppm\n\n\n\n\ncxq1000_FILT\ncoaxial quadrature 1000 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-4.97\n156.90\nppm\n\n\n\n\ncxi5500_FILT\ncoaxial inphase 5500 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-27.67\n308.49\nppm\n\n\n\n\ncxq5500_FILT\ncoaxial quadrature 5500 Hz -unlevelled\nFugro Airborne Surveys\n\n\n-0.37\n238.31\nppm\n\n\n\n\ncpi7200_FILT\ncoplanar inphase 7200 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-59.83\n1054.10\nppm\n\n\n\n\ncpq7200_FILT\ncoplanar quadrature 7200 Hz -unlevelled\nFugro Airborne Surveys\n\n\n6.33\n825.07\nppm\n\n\n\n\ncpi56K_FILT\ncoplanar inphase 56 kHz - unlevelled\nFugro Airborne Surveys\n\n\n-25.12\n1728.81\nppm\n\n\n\n\ncpq56K_FILT\ncoplanar quadrature 56 kHz - unlevelled\nFugro Airborne Surveys\n\n\n37.49\n789.37\nppm\n\n\n\n\ncpi900\ncoplanar inphase 900 Hz\nFugro Airborne Surveys\n\n\n-99.26\n713.56\nppm\n\n\n\n\ncpq900\ncoplanar quadrature 900 Hz\nFugro Airborne Surveys\n\n\n0.07\n541.71\nppm\n\n\n\n\ncxi1000\ncoaxial inphase 1000 Hz\nFugro Airborne Surveys\n\n\n-30.19\n142.91\nppm\n\n\n\n\ncxq1000\ncoaxial quadrature 1000 Hz\nFugro Airborne Surveys\n\n\n-4.44\n157.01\nppm\n\n\n\n\ncxi5500\ncoaxial inphase 5500 Hz\nFugro Airborne Surveys\n\n\n-27.22\n308.22\nppm\n\n\n\n\ncxq5500\ncoaxial quadrature 5500 Hz\nFugro Airborne Surveys\n\n\n1.41\n244.19\nppm\n\n\n\n\ncpi7200\ncoplanar inphase 7200 Hz\nFugro Airborne Surveys\n\n\n-59.97\n1054.05\nppm\n\n\n\n\ncpq7200\ncoplanar quadrature 7200 Hz\nFugro Airborne Surveys\n\n\n6.82\n833.54\nppm\n\n\n\n\ncpi56k\ncoplanar inphase 56k Hz\nFugro Airborne Surveys\n\n\n-25.34\n1728.84\nppm\n\n\n\n\ncpq56K\ncoplanar quadrature 56k Hz\nFugro Airborne Surveys\n\n\n37.48\n790.30\nppm\n\n\n\n\nres900\napparent resistivity 900 Hz; cut-off value for apparent resistivity was 1325; more information in process steps\nFugro Airborne Surveys\n\n\n0.06\n1325\nohm\u00ef\u00bf\u00bdm\n\n\n\n\nres7200\napparent resistivity 7200 Hz; cut-off value for apparent resistivity was 10750; more information in process steps\nFugro Airborne Surveys\n\n\n0.83\n8632.46\nohm\u00ef\u00bf\u00bdm\n\n\n\n\nres56K\napparent resistivity 56k Hz; cut-off value for apparent resistivity was 60000; more information in process steps\nFugro Airborne Surveys\n\n\n10.87\n18100.85\nohm\u00ef\u00bf\u00bdm\n\n\n\n\ndep900\napparent depth 900 Hz; more information in process steps\nFugro Airborne Surveys\n\n\n-35.08\n111.80\nm\n\n\n\n\ndep7200\napparent depth 7200 Hz; more information in process steps\nFugro Airborne Surveys\n\n\n-38.48\n71.26\nm\n\n\n\n\ndep56K\napparent depth 56k Hz; more information in process steps\nFugro Airborne Surveys\n\n\n-32.37\n31.59\nm\n\n\n\n\ndifi\ndifference channel based on cxi5500 & cpi7200\nFugro Airborne Surveys\n\n\n-34.19\n78.54\nunitless\n\n\n\n\ndifq\ndifference channel based on cxq5500 & cpq7200\nFugro Airborne Surveys\n\n\n-6.75\n53.17\nunitless\n\n\n\n\ncppl\ncoplanar powerline monitor\nFugro Airborne Surveys\n\n\n0.00\n0.00\nunitless\n\n\n\n\ncxsp\ncoaxial spherics monitor\nFugro Airborne Surveys\n\n\n0.00\n0.00\nunitless\n\n\n\n\ncpsp\ncoplanar spherics monitor\nFugro Airborne Surveys\n\n\n0.00\n0.00\nunitless\n\n\n\n\n\n\nBeaverCrk_linedata_asGDB.zip and BeaverCrk_linedata_asXYZ.zip\nThe Beaver Creek files in the Linedata folder contain raw and processed linedata and related calculated fields for locational, magnetic, and electromagnetic data. Linedata is provided in Geosoft binary grid (GRD) and Geosoft ASCII XYZ (XYZ) formats; formatting varies slightly between these. Except for the 'LINE' and 'TYPE' (of line) information, all attributes, including 'DATE' and 'FLIGHT', are represented by one of the 50 data columns on each record. The 'LINE' and 'TYPE' attributes are discussed further in the attribute 'ID Cell'.\nL.E. Burns & Fugro Airborne Surveys\nLINEDATA\n\n\nID_CELL\n\nIn the Geosoft software 'Oasis Montaj', information about the flight lines in the linedata file is shown in an unlabeled 'ID CELL' in the spreadsheet window. The format of the ID cell is 'TYPE LineNumber:Flight (Designator or Identifier), where TYPE refers to the type of flight line, LineNumber refers to the actual numbered line flown, and flight designator provides the data acquisition system identifier and the flight number. The 'ID CELL' content, particularly combined with the definitions below for this particular survey, provides information about the flight line layout. The 'Flight' designator is discussed below in more detail as an 'Attribute'.\nEach ID-cell value will have an associated spreadsheet view consisting of a column for each of the 50 attributes for a particular line number. In the XYZ file, the 'LINE' and 'FLIGHT' attributes and the 'DATE' are present as header lines, one attribute per line, before each set of associated data, for example:\n>\n> //Flight 3054\n> //Date 2012/10/28\n> Line 50010\n> Followed by all records for points sampled along Line 10010.\n> (Pattern is repeated for each line number).\n\nL.E. Burns & Fugro Airborne Surveys\n\n\nLINE TYPES and SYMBOLS:\n> Traverse lines \u00ef\u00bf\u00bd oriented nominally N20W (heading of 160 degrees)\n> Tie lines - oriented nominally N70E (heading of 70 degrees)\n> Border lines - present inside and parallel to the survey\n> tract border where traverse or tie lines\n> are not parallel to the border.\n> Traverse lines \u00ef\u00bf\u00bd 'L' (GDB file); 'LINE' (XYZ file).\n> Tie and border lines - 'T' (GDB file); 'TIE' (XYZ file).\n>\n> LINE NUMBERS\n> Planned flight lines increase by 10 in a consistent fashion.\n> For this project, traverse line numbers increase from SW to\n> NE; tie line numbers increase from north to south; and\n> border line numbers increase in a clockwise direction.\n>\n> When more than one uninterrupted flight traverse was needed\n> to complete a planned flight line, the fifth digit of the line\n> number is increased by '1' for each new flight segment/version.\n>\n> MAIN LINE NUMBERS:\n> BeaverCk\n> Lowest Traverse lines(SW): L50010\n> Highest Traverse lines(NE): L50770\n> Lowest Tie Lines: T59010\n> Highest Tie Lines: T59060\n> Lowest Border Lines: T59070\n> Highest Border Lines: T59170\n\n\n\n\nx_NAD27z4N\neasting NAD 27 (UTM Zone 4)\nFugro Airborne Surveys\n\n\n566615.37\n595794.27\nm\n\n\n\n\ny_NAD27z4N\nnorthing NAD 27 (UTM Zone 4)\nFugro Airborne Surveys\n\n\n6902855.96\n6933910.75\nm\n\n\n\n\nfid\nFiducial increment; the time in tenths of seconds from the start to the end of the particular flight.\nFugro Airborne Surveys\n\nThe attribute measurement resolution is 0.1 second. The values increase from the beginning of a flight to the end. Only FIDs during production flights are included in the database.\n\n\n\nlat_WGS84\nlatitude WGS 84\nFugro Airborne Surveys\n\n\n62.2483707\n62.5271700\ndegrees\n\n\n\n\nlon_WGS84\nlongitude WGS 84\nFugro Airborne Surveys\n\n\n-157.7107234\n-157.1501231\ndegrees\n\n\n\n\nflight\nThe flight designator is composed of Fugro\u00ef\u00bf\u00bds identification number of the HeliDAS (data acquisition system) used and the flight number. For the Beaver Creek block, two HeliDAS systems were used. The flight number, numbered sequentially for each helicopter, denotes a particular flight of that helicopter from home base to home base. Only flights that acquired final raw data for the survey are in the linedata files.\nFugro Airborne Surveys\n\nTwo helicopters (B-2) were used for the Beaver Creek block. Values in the linedata channel for the this survey include flights between 3054 to 3065, and 4099 to 4102.\n\n\n\ndate\nrange of flight dates (yyyy/mm/dd) for production flights\nFugro Airborne Surveys\n\n\n2012/10/28\n2012/11/02\nday\n\n\n\n\naltrad_calcbird\ncalculated bird height above surface to simulate location of radar altimeter in the bird; radar altimeter measurement was recorded in helicopter. Altrad_calcbird was calculated by subtracting constant from which represented distance in altitude from helicopter to the bird when towing and recording data.\nFugro Airborne Surveys\n\n\n11.54\n121.94\nm\n\n\n\n\naltlas_bird\nbird height above surface, measured by laser altimeter in the EM bird\nFugro Airborne Surveys\n\n\n9.34\n123.06\nm\n\n\n\n\ngpsz\nbird height above spheroid. The GPSZ (or GPS-Z) value is primarily dependent on the number of available satellites. Although post-processing of GPS data will yield X and Y accuracies on the order of 1 meter, the accuracy of the Z value is usually much less, sometimes in the +/-20 meter range.\nFugro Airborne Surveys\n\n\n154.90\n707.10\nm\n\n\n\n\ndtm\ndigital terrain model (NAD27 UTM zone 7); calculated from channel 'GPS-Z' and the laser data (channel 'ALTLAS_BIRD') measured in the bird '\nFugro Airborne Surveys\n\n\n123.65\n669.09\nm\n\n\n\n\ndiurnal_filt\nmeasured diurnal ground magnetic intensity; interpolated to 0.1 sec. from 1.0 second measurements\nFugro Airborne Surveys\n\n\n55319.37\n55484.44\nnT\n\n\n\n\ndiurnal_cor\ndiurnal correction - base removed; calculated from interpolated diurnal_filt\nFugro Airborne Surveys\n\n\n-165.03\n4.33\nnT\n\n\n\n\nmag_raw\ntotal magnetic field - spike rejected\nFugro Airborne Surveys\n\n\n55296.18\n55595.92\nnT\n\n\n\n\nmag_lag\ntotal magnetic field - corrected for lag\nFugro Airborne Surveys\n\n\n55296.18\n55595.92\nnT\n\n\n\n\nmag_diu\ntotal magnetic field - diurnal variation removed\nFugro Airborne Surveys\n\n\n55367.04\n55602.24\nnT\n\n\n\n\nigrf\ninternational geomagnetic reference field\nFugro Airborne Surveys\n\n\n55529.13\n55636.07\nnT\n\n\n\n\nmag_rmi\nresidual magnetic intensity - IGRF removed, then leveled - final\nFugro Airborne Surveys\n\n\n-214.90\n8.87\nnT\n\n\n\n\nmagigrf\ntotal magnetic field with IGRF removed - mag_rmi with constant added back - final\nFugro Airborne Surveys\n\n\n55367.23\n55586.87\nnT\n\n\n\n\ncpi900_FILT\ncoplanar inphase 900 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-17.35\n57.28\nppm\n\n\n\n\ncpq900_FILT\ncoplanar quadrature 900 Hz - unlevelled\nFugro Airborne Surveys\n\n\n2.86\n202.54\nppm\n\n\n\n\ncxi1000_FILT\ncoaxial inphase 1000 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-4.95\n21.45\nppm\n\n\n\n\ncxq1000_FILT\ncoaxial quadrature 1000 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-0.4\n65.88\nppm\n\n\n\n\ncxi5500_FILT\ncoaxial inphase 5500 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-9.77\n103.41\nppm\n\n\n\n\ncxq5500_FILT\ncoaxial quadrature 5500 Hz -unlevelled\nFugro Airborne Surveys\n\n\n-8.91\n175.77\nppm\n\n\n\n\ncpi7200_FILT\ncoplanar inphase 7200 Hz - unlevelled\nFugro Airborne Surveys\n\n\n-0.84\n376.97\nppm\n\n\n\n\ncpq7200_FILT\ncoplanar quadrature 7200 Hz -unlevelled\nFugro Airborne Surveys\n\n\n11.35\n772.03\nppm\n\n\n\n\ncpi56K_FILT\ncoplanar inphase 56 kHz - unlevelled\nFugro Airborne Surveys\n\n\n22.84\n1324.05\nppm\n\n\n\n\ncpq56K_FILT\ncoplanar quadrature 56 kHz - unlevelled\nFugro Airborne Surveys\n\n\n11.17\n3429.34\nppm\n\n\n\n\ncpi900\ncoplanar inphase 900 Hz\nFugro Airborne Surveys\n\n\n-13.12\n54.91\nppm\n\n\n\n\ncpq900\ncoplanar quadrature 900 Hz\nFugro Airborne Surveys\n\n\n2.69\n202.36\nppm\n\n\n\n\ncxi1500\ncoaxial inphase 1000 Hz\nFugro Airborne Surveys\n\n\n-3.53\n20.4\nppm\n\n\n\n\ncxq1500\ncoaxial quadrature 1000 Hz\nFugro Airborne Surveys\n\n\n-0.41\n65.97\nppm\n\n\n\n\ncxi5500\ncoaxial inphase 5500 Hz\nFugro Airborne Surveys\n\n\n-0.84\n103.59\nppm\n\n\n\n\ncxq5500\ncoaxial quadrature 5500 Hz\nFugro Airborne Surveys\n\n\n2.75\n175.74\nppm\n\n\n\n\ncpi7200\ncoplanar inphase 7200 Hz\nFugro Airborne Surveys\n\n\n0.45\n377.12\nppm\n\n\n\n\ncpq7200\ncoplanar quadrature 7200 Hz\nFugro Airborne Surveys\n\n\n10.73\n771.97\nppm\n\n\n\n\ncpi56k\ncoplanar inphase 56k Hz\nFugro Airborne Surveys\n\n\n23.12\n1324.38\nppm\n\n\n\n\ncpq56K\ncoplanar quadrature 56k Hz\nFugro Airborne Surveys\n\n\n10.60\n3428.81\nppm\n\n\n\n\nres900\napparent resistivity 900 Hz; cut-off value for apparent resistivity was 1325; more information in process steps\nFugro Airborne Surveys\n\n\n47.81\n1325\nohm\u00ef\u00bf\u00bdm\n\n\n\n\nres7200\napparent resistivity 7200 Hz; cut-off value for apparent resistivity was 10750; more information in process steps\nFugro Airborne Surveys\n\n\n45.14\n5347.72\nohm\u00ef\u00bf\u00bdm\n\n\n\n\nres56K\napparent resistivity 56k Hz; cut-off value for apparent resistivity was 60000; more information in process steps\nFugro Airborne Surveys\n\n\n35.94\n2272.85\nohm\u00ef\u00bf\u00bdm\n\n\n\n\ndep900\napparent depth 900 Hz; more information in process steps\nFugro Airborne Surveys\n\n\n-56.58\n117.79\nm\n\n\n\n\ndep7200\napparent depth 7200 Hz; more information in process steps\nFugro Airborne Surveys\n\n\n-35.21\n30.59\nm\n\n\n\n\ndep56K\napparent depth 56k Hz; more information in process steps\nFugro Airborne Surveys\n\n\n-35.12\n10.77\nm\n\n\n\n\ndifi\ndifference channel based on cxi5500 & cpi7200\nFugro Airborne Surveys\n\n\n-16.22\n31.01\nunitless\n\n\n\n\ndifq\ndifference channel based on cxq5500 & cpq7200\nFugro Airborne Surveys\n\n\n-29.42\n51.92\nunitless\n\n\n\n\ncppl\ncoplanar powerline monitor\nFugro Airborne Surveys\n\n\n0.00\n1.48\nunitless\n\n\n\n\ncxsp\ncoaxial spherics monitor\nFugro Airborne Surveys\n\n\n0.00\n0.04\nunitless\n\n\n\n\ncpsp\ncoplanar spherics monitor\nFugro Airborne Surveys\n\n\n0.00\n0.21\nunitless\n\n\n\n\n\n\ngpr2013-1_GRIDSasGRD_NAD27_z4N.zip and gpr2013-1_GRIDSasERS_NAD27_z4N.zip are included in gpr2013-1_GRIDS_as_ERS-and-GRD.zip in the online version\n\nThe zip files contain the 30 grids and supporting files for this publication in either Geosoft binary float (GRD) format and/or ER Mapper (ERS) format. Each grid is in NAD27 datum, UTM Zone 4N, and has a 25m cell size with x and y in meters. An image from each of the grids is provided as Geotiffs and KMZ files. Grid files are listed below as attributes.\n>\nThe Geosoft grid consists of one file (.GRD). Each ER Mapper grid consists of two files, a header (projection) file (.ERS) and a data file (no extension). Both ER Mapper files are necessary to view a grid or to convert it to another software format. In addition, Geosoft projection files (GI) are included for both Geosoft and ER Mapper grids files, which automatically sets the projection of the grid in the associated software if the appropriate GI file is placed in the same directory as the grid.\n>\nEach ER Mapper grid consists of two files, a header (projection) file (.ERS) and a data file (no extension). Both ER Mapper files are necessary to view a grid or to convert it to another software format.\n\nFugro Airborne Surveys\nGRIDS\n\n\nXXX_magRMI\nResidual magnetic field (nT) - final; IGRF model 2010, updated for date of flight and elevation variations, was subtracted from Mag_Diu, then the data were leveled.\nFugro Airborne Surveys\n\nGrid file\n\n\n\nXXX_magIGRF\nTotal magnetic field (nT) - final, with IGRF removed; residual magnetic field (magRMI) with constant added back in. Not produced as a map.\nFugro Airborne Surveys\n\nGrid file\n\n\n\nXXX_1VD\nFirst vertical derivative 'dz' (nT/m) of the total magnetic field with IGRF removed; also referred to as 'calculated vertical gradient' (cvg).\nFugro Airborne Surveys\n\nGrid file\n\n\n\nXXX_ASig\nAnalytic signal (nT/m) calculated from the total magnetic field with IGRF removed.\nFugro Airborne Surveys\n\nGrid file\n\n\n\nXXX_TiltDer\nTilt derivative (degrees) of the total magnetic field with IGRF removed.\nFugro Airborne Surveys\n\nGrid file\n\n\n\nXXX_res56k\nApparent coplanar resistivity (ohm-m) for 56,000 (56k) Hz.; calculated using a pseudo-layer half-space model.\nFugro Airborne Surveys\n\nGrid file\n\n\n\nXXX_res7200\nApparent coplanar resistivity (ohm-m) for 7200 Hz.; calculated using a pseudo-layer half-space model.\nFugro Airborne Surveys\n\nGrid file\n\n\n\nXXX_res900\nApparent coplanar resistivity (ohm-m) for 900 Hz.; calculated using a pseudo-layer half-space model.\nFugro Airborne Surveys\n\nGrid file\n\n\n\nXXX_DTM\nDigital terrain or elevation model (m). Not shown as a map.\nFugro Airborne Surveys\n\nGrid file\n\n\n\nXXX_AltLasBird\nEM bird height (m) above surface, measured by Laser altimeter in EM bird. Not shown as a map.\nFugro Airborne Surveys\n\nGrid file\n\n\n\n\n\ngpr2013-1_GEOTIFFS_NAD27_z4N.zip\nThe zip file 'GPR2013-1_GEOTIFGS_NAD27_z4N.zip' contains GeoTiffs in NAD27, UTM Zone 4N. Each of the 11 grids is represented in GeoTiff (TIF) format. Each of the 10 grids for each area is provided as a GeoTiff file. For each area, the images shown in 7 of the KMZ files are the same images used on the maps in this publication; no maps were made of the other 3 images.\nFugro Airborne Surveys\nGEOTIFFS\n\n\nXXX_magRMI\nResidual magnetic field (nT) - final; IGRF model 2010, updated for date of flight and elevation variations, was subtracted from Mag_Diu, then the data were leveled.\nFugro Airborne Surveys\n\nGeotiff file\n\n\n\nXXX_magIGRF\nTotal magnetic field (nT) - final, with IGRF removed; residual magnetic field (magRMI) with constant added back in. Not produced as a map.\nFugro Airborne Surveys\n\nGeotiff file\n\n\n\nXXX_1VD\nFirst vertical derivative 'dz' (nT/m) of the total magnetic field with IGRF removed; also referred to as 'calculated vertical gradient' (cvg).\nFugro Airborne Surveys\n\nGeotiff file\n\n\n\nXXX_ASig\nAnalytic signal (nT/m) calculated from the total magnetic field with IGRF removed.\nFugro Airborne Surveys\n\nGeotiff file\n\n\n\nXXX_TiltDer\nTilt derivative (degrees) of the total magnetic field with IGRF removed.\nFugro Airborne Surveys\n\nGeotiff file\n\n\n\nXXX_res56k\nApparent coplanar resistivity (ohm-m) for 56,000 (56k) Hz.; calculated using a pseudo-layer half-space model.\nFugro Airborne Surveys\n\nGeotiff file\n\n\n\nXXX_res7200\nApparent coplanar resistivity (ohm-m) for 7200 Hz.; calculated using a pseudo-layer half-space model.\nFugro Airborne Surveys\n\nGeotiff file\n\n\n\nXXX_res900\nApparent coplanar resistivity (ohm-m) for 900 Hz.; calculated using a pseudo-layer half-space model.\nFugro Airborne Surveys\n\nGeotiff file\n\n\n\nXXX_DTM\nDigital terrain or elevation model (m). Not shown as a map.\nFugro Airborne Surveys\n\nGeotiff file\n\n\n\nLad_AltLasBird\nEM bird height (m) above surface, measured by Laser altimeter in EM bird. Not shown as a map.\nFugro Airborne Surveys\n\nGeotiff file\n\n\n\n\n\ngpr2013-1_KMZS_WGS84.zip\nThe zip file 'gpr2013-1_KMZS_WGS84.zip' contains Google Earth KMZ files in Geographic Coordinate System (Simple Cylindrical projection) with a WGS84 datum. Each of the 10 grids for each area is provided as a kmz file. For each area, the images shown in 7 of the KMZ files are the same images used on the maps in this publication; no maps were made of the other 3 images.\nFugro Airborne Surveys\nKMZs\n\n\nXXX_magRMI\nResidual magnetic field (nT) - final; IGRF model 2010, updated for date of flight and elevation variations, was subtracted from Mag_Diu, then the data were leveled.\nFugro Airborne Surveys\n\nKMZ file\n\n\n\nXXX_magIGRF\nTotal magnetic field (nT) - final, with IGRF removed; residual magnetic field (magRMI) with constant added back in. Not produced as a map.\nFugro Airborne Surveys\n\nKMZ file\n\n\n\nXXX_1VD\nFirst vertical derivative 'dz' (nT/m) of the total magnetic field with IGRF removed; also referred to as 'calculated vertical gradient' (cvg).\nFugro Airborne Surveys\n\nKMZ file\n\n\n\nXXX_ASig\nAnalytic signal (nT/m) calculated from the total magnetic field with IGRF removed.\nFugro Airborne Surveys\n\nKMZ file\n\n\n\nXXX_TiltDer\nTilt derivative (degrees) of the total magnetic field with IGRF removed.\nFugro Airborne Surveys\n\nKMZ file\n\n\n\nXXX_res56k\nApparent coplanar resistivity (ohm-m) for 56,000 (56k) Hz.; calculated using a pseudo-layer half-space model.\nFugro Airborne Surveys\n\nKMZ file\n\n\n\nXXX_res7200\nApparent coplanar resistivity (ohm-m) for 7200 Hz.; calculated using a pseudo-layer half-space model.\nFugro Airborne Surveys\n\nKMZ file\n\n\n\nXXX_res900\nApparent coplanar resistivity (ohm-m) for 900 Hz.; calculated using a pseudo-layer half-space model.\nFugro Airborne Surveys\n\nKMZ file\n\n\n\nXXX_DTM\nDigital terrain or elevation model (m). Not shown as a map.\nFugro Airborne Surveys\n\nKMZ file\n\n\n\n\n\ngpr2013-1_VECTORSasDXF_NAD27_z4N and gpr2013-1_VECTORSasSHP_NAD27_z4N\n\nData contours produced for the maps are provided in Autocad DXF and ESRI shape file format. Except for maps GPR2013-1-6 and GPR2013-1-7, the vector files are shown on the maps without topography. Caution should be used when reading the contour labels from the shape and DXF files as they may appear to be with a different line. Additional vector files included are the flight path, the Alaska Section Grid, and a UTM grid for each map or survey area.\n> Each file format (DXF and shape file) contains the same information. A DXF file (e.g. XXX_magRMI.dxf) contains the information in layers within the file, and the shape file format consists of each layer as a separate file (e.g. XXX_magRMI_1, XXX_magRMI_2, XXX_magRMI_3, and XXX_magRMI_4). Most sets of shape files in this publication contain 4 or 5 files. Each type of contours is only described once in the 'Attribute' items below. Please refer to the map legends for appropriate line widths and particular label placement.\n> Neither the DXF nor the shape files are attributed. All labeling is done through individual non-text characters, e.g. line number 60010 would be represented by 5 individual characters instead of one number. Sometimes the numbers or letters are formed from disconnected lines and/or arcs.\n\nFugro Airborne Surveys\nVECTORS\n\n\nXXX_magRMI\nContours, \"triangles\" denoting lows, and labels for the residual magnetic field data\nFugro Airborne Surveys\n\nvector file\n\n\n\nXXX_ASig\nContours and labels for the analytic signal data\nFugro Airborne Surveys\n\nvector file\n\n\n\nXXX_TiltDer\nContours and labels for the magnetic tilt derivative data Contours are provided at specific values for aid in interpretation of approximate contact location '0' contour), and depth to contact. Contours include the values -45, -30, -15, 0, +15, +30, and +45.\nFugro Airborne Surveys\n\nvector file\n\n\n\nXXX_res56k\nContours and labels for the 56,000 Hz coplanar apparent resistivity data\nFugro Airborne Surveys\n\nvector file\n\n\n\nXXX_res7200\nContours and labels for the 7200 Hz coplanar apparent resistivity data\nFugro Airborne Surveys\n\nvector file\n\n\n\nXXX_res900\nContours and labels for the 900 Hz coplanar apparent resistivity data\nFugro Airborne Surveys\n\nvector file\n\n\n\nXXX_FP\nFlight, tie, and border lines, line and flight numbers, tics and labels for the survey lines flown; file not attributed\nFugro Airborne Surveys\n\na continuous line is used for each flight line; short tics are used for 10 second fiducial marks; larger tics are used for 50 second fiducial marks; 'numbers' for the line numbers, flight numbers, and tics are non-editable text. The end of a flight line that is labeled with both the line number and the flight number, instead of just the line number, is the indicator for the start of the flight.\n\n\n\nXXX_SecGrid\nAlaska PLSS Section Grid (original file name 'pls_section') for the map areas. Modified by Fugro Airborne Surveys for line width, color, township and range numbers, and latitude and longitude to use on the maps.\nAlaska Department of Natural Resources - Land Records Information Section; L.E. Burns, Division of Geological & Geophysical Surveys; and Fugro Airborne Surveys\n\nvector file\n\n\n\nXXX_UTMGrid\nA UTM grid for the map area produced by Fugro Airborne Surveys. Consists of non-text UTM labels around the edges of the map sheets.\nFugro Airborne Surveys\n\nvector file\n\n\n\n\n\ngpr2013-1_01-39_ALL_HPGL2.zip, gpr2013-1_MAPS_01-13_Dishna_PDFS, gpr2013-1_MAPS_14-39_FoxBeaver_PDFSDish.zip\nZip file names indicate the map numbers and format included in the zip file. Dishna maps are numbered '1A', '1B', etc., to '13A' and '13B'. Maps for Fox Hills are numbered 14-26, and the Beaver Creek maps are numbered 27-39.\nFugro Airborne Surveys\nMAPS\n\n\nGPR2013-1-1A\nResidual magnetic field with topography; in nanoteslas (nT); northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-1B\nResidual magnetic field with topography; in nanoteslas (nT); southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-2A\nResidual magnetic field with data contours; in nanoteslas (nT); northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-2B\nResidual magnetic field (nT) with data contours; in nanoteslas (nT); southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-3A\nFirst vertical derivative with topography; in nT/m; calculated from the residual magnetic field; northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-3B\nFirst vertical derivative with topography; in nT/m; calculated from the residual magnetic field; southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-4A\nAnalytic signal with topography; in nT/m; calculated from the residual magnetic field; northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-4B\nAnalytic signal with topography; in nT/m; calculated from the residual magnetic field; southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-5A\nAnalytic signal with data contours; in nT/m; calculated from the residual magnetic field; northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-5B\nAnalytic signal with data contours; in nT/m; calculated from the residual magnetic field; southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-6A\nTilt derivative with topography and data contours; in degrees; calculated from residual magnetic field; northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-6B\nTilt derivative with topography and data contours; in degrees; calculated from residual magnetic field; southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-7A\nColor shadow residual magnetic field with magnetic tilt derivative contours; color in nT; contours in degrees; northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-7B\nColor shadow residual magnetic field with magnetic tilt derivative contours; color in nT; contours in degrees; southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-8A\n56,000 Hz apparent coplanar resistivity with topography; in ohm m; northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-8B\n56,000 Hz apparent coplanar resistivity with topography; in ohm m; southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-9A\n56,000 Hz apparent coplanar resistivity with data contours; in ohm m; northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-9B\n56,000 Hz apparent coplanar resistivity with data contours; in ohm m; southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-10A\n7200 Hz apparent coplanar resistivity with topography; in ohm m; northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-10B\n7200 Hz apparent coplanar resistivity with topography; in ohm m; southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-11A\n7200 Hz apparent coplanar resistivity with data contours; in ohm m; northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-11B\n7200 Hz apparent coplanar resistivity with data contours; in ohm m; southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-12A\n900 Hz apparent coplanar resistivity with topography; in ohm m; northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-12B\n900 Hz apparent coplanar resistivity with topography; in ohm m; southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-13A\n900 Hz apparent coplanar resistivity with data contours; in ohm m; northern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-13B\n900 Hz apparent coplanar resistivity with data contours; in ohm m; southern sheet for southern Dishna River.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-14\nResidual magnetic field with topography; in nanoteslas (nT); Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-15\nResidual magnetic field with data contours; in nanoteslas (nT); Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-16\nFirst vertical derivative with topography; in nT/m; calculated from the residual magnetic field; Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-17\nwith topography; in nT/m; calculated from the residual magnetic field; Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-18\nAnalytic signal with data contours; in nT/m; calculated from the residual magnetic field; Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-19\nTilt derivative with topography and data contours; in degrees; calculated from residual magnetic field; Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-20\nColor shadow residual magnetic field with magnetic tilt derivative contours; color in nT; contours in degrees; Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-21\n56,000 Hz apparent coplanar resistivity with topography; in ohm m; Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-22\n56,000 Hz apparent coplanar resistivity with data contours; in ohm m; Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-23\n7200 Hz apparent coplanar resistivity with topography; in ohm m; Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-24\n7200 Hz apparent coplanar resistivity with data contours; in ohm m; Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-25\n900 Hz apparent coplanar resistivity with topography; in ohm m; Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-26\n900 Hz apparent coplanar resistivity with data contours; in ohm m; Fox Hills.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-27\nResidual magnetic field with topography; in nanoteslas (nT); Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-28\nResidual magnetic field with data contours; in nanoteslas (nT); Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-29\nFirst vertical derivative with topography; in nT/m; calculated from the residual magnetic field; Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-30\nAnalytic signal with topography; in nT/m; calculated from the residual magnetic field; Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-31\nAnalytic signal with data contours; in nT/m; calculated from the residual magnetic field; Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-32\nTilt derivative with topography and data contours; in degrees; calculated from residual magnetic field; Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-33\nColor shadow residual magnetic field with magnetic tilt derivative contours; color in nT; contours in degrees; Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-34\n56,000 Hz apparent coplanar resistivity with topography; in ohm m; Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-35\n56,000 Hz apparent coplanar resistivity with data contours; in ohm m; Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-36\n7200 Hz apparent coplanar resistivity with topography; in ohm m; Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-37\n7200 Hz apparent coplanar resistivity with data contours; in ohm m; Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-38\n900 Hz apparent coplanar resistivity with topography; in ohm m; Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\nGPR2013-1-39\n900 Hz apparent coplanar resistivity with data contours; in ohm m; Beaver Creek.\nFugro Airborne Surveys\n\nmap in PDF and HPGL/2 formats\n\n\n\n\n\nAll three linedata databases (SDishnaRiver, FoxHills, and BeaverCrk) have identical channels, which are described in 'gpr2013_001_linedata.txt', Fugro's linedata channel summary. The three linedata databases each have a 'Detailed_Description' below in this 'Entity_and_Attribute_Information' section. A more detailed definition is given for some entities in the detailed section than in the file 'gpr2013_001_linedata.txt'. Minimum and maximum values, plus values that have unrepresentable domains are given in the 'Entity_and_Attribute_Information' section. The linedata text file is easier to read.\nEach linedata file contains raw and processed linedata, and related calculated fields. Missing data are represented with the dummy variable '*'. Each of the flight lines (e.g., Line 40010, referred to as 'LINE' attribute) is associated with a 'DATE' (e.g., 2012/09/25), a 'FLIGHT (number)' (e.g., 3023), and a particular multi-record set of data. Each record represents data acquisition from one spatial location in the flight line.\n\nL.E. Burns, Division of Geological & Geophysical Surveys and Fugro Airborne Surveys\n\n\n\nMost geophysical images that were included in a map in this publication are placed on two maps, one with topography and one with data contours and no topography. Maps are provided in PDF and HPGL/2 format, and are downloadable in zip files by data format. The HPGL/2 files have brighter and more gradational colors, and sharper topography than the Adobe Acrobat files. See 'Technical_Prerequisites' section for more information on printing HPGL/2 maps.\n>\nThirteen maps are included for each area. All maps in this publication are at a scale of 1:63,360 (inch-to-a-mile). One map sheet each is needed to cover the Fox Hills and Beaver Creek areas. Two map sheets, labeled 'A' (north) and 'B' (south), are needed to cover the Dishna survey area at a scale of 1:63,360 (inch-to-a-mile).\n\nL.E. Burns, Division of Geological & Geophysical Surveys, and Fugro Airborne Surveys\n\n\n\n\n\n\nAlaska Division of Geological & Geophysical Surveys\n\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5020\n(907)451-5050\ndggspubs@alaska.gov\n8 am to 4:30 pm, Monday through Friday, except State holidays\nPlease view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible.\n\n\nGPR 2013-1\nThe State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.\n\nCurrent geophysics publications are available on paper or Mylar. Please ask for the maps to be printed from HPGL/2 files to ensure the best quality image. To purchase printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: cash, check, money order, VISA, or MasterCard.\nContact DGGS for current pricing\n\n\n\n\nGeosoft binary float (GRD)\nUnknown\n\n\n\nDVD\nUnspecified\n\n\n\n\n\nER Mapper (ERS)\nUnknown\n\n\n\nDVD\nUnspecified\n\n\n\n\n\nGeosoft binary database (GDB)\nUnknown\n\n\n\nDVD\nUnspecified\n\n\n\n\n\nGeosoft ASCII (XYZ)\nUnknown\n\n\n\nDVD\nUnspecified\n\n\n\n\n\nESRI Shape (SHP)\nUnknown\n\n\n\nDVD\nUnspecified\n\n\n\n\n\nPDF\n1.5\n\n\n\nDVD\nUnspecified\n\n\n\n\n\nHPGL/2\nunknown\n\n\n\n\n\nhttp://dx.doi.org/10.14509/26701\n\n\n\n\nDVD\nUnspecified\n\n\n\nDigital files on DVD are available for $10 plus shipping and are free when downloaded online.\nOrder by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: cash, check, money order, VISA, or MasterCard. The geophysics page of the DGGS web site (http://www.dggs.alaska.gov/pubs/geophysics) has geophysical order forms for this project and others.\nDigital downloads: less than 30 minutes for most files. Free FTP access is available upon request for files not available on the web. Offline CD/DVD-ROMs: 1-2 weeks unless special arrangements are made and an express fee is paid.\n\nDGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media over the counter, by mail, phone, fax, or email from the DGGS Fairbanks office. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for exact shipping amount.\nSoftware with ability to use, import, or convert Geosoft float GRD, Geosoft binary GDB or ASCII XYZ files, Autocad DXF files, ESRI Shape files, Adobe Acrobat PDF, Google Earth files, and text files. Free downloadable interfaces to view or convert the gridded and dxf files are available at the Geosoft Web site (http://www.geosoft.com; Oasis Montaj viewer). The KMZ files can be dragged and dropped into the 'My Places' folder of the free downloadable 'Google Earth' software. Freeware software 'printfile' (http://www.lerup.com/printfile/) prints HPGL/2 files easily on compatible printers. The HPGL/2 files have brighter colors and sharper topography than the PDF maps and should be used for printing when possible. The PDF format maps are the only maps digitally viewable in this publication.\n\n\n20131115\n\n\n\nAlaska Division of Geological & Geophysical Surveys\n\nMetadata Manager\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5020\n\n\nFGDC Content Standard for Digital Geospatial Metadata\nFGDC-STD-001-1998\nIf the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys.\n\nhttp://www.dggs.alaska.gov/metadata/dggs.ext\ndggs metadata extensions\n\n\n\n","source_transform":null,"status":"error"}