{"action":"create","ckan_id":null,"date_created":"Sat, 14 Mar 2026 21:17:12 GMT","date_finished":null,"harvest_job_id":"be129330-b656-44ec-b4d7-f277bf7d7116","harvest_source_id":"31f41541-38a0-400b-b240-10ebcb0acd9a","id":"e52d0006-d0e7-474f-a4e2-dea07c4c8f87","identifier":"https://dggs.alaska.gov/webpubs/metadata/RDF2014-2.xml","parent_identifier":null,"source_hash":"056c223c7ff02a46d5968f0ab67c8c96d031bc9fe8bed7efc9b1e0caaac91036","source_raw":"\n\n\n\n\nSoutherland, L.E.\nKinsman, N.E.M.\n2014\nLiDAR data for Unalakleet, Alaska, collected in October 27, 2005\ndigital-data, report\n\nRaw Data File\nRDF 2014-2\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n12 p.\nhttp://dx.doi.org/10.14509/27121\n\n\n\nThis report is a summary of a LiDAR data collection over the community of Unalakleet, in the Norton Sound region of Alaska. The original data were collected on October 27, 2005 by AeroMetric, Inc., under contract by Rodney P. Kinney and Associates, Inc. The complete, classified LiDAR dataset was purchased by the State of Alaska Division of Geological & Geophysical Surveys in 2013 in support of coastal vulnerability mapping efforts. For the purposes of open access to LiDAR datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license.\nThis report is a summary of a LiDAR data collection over the community of Unalakleet, in the Norton Sound region of Alaska. The original data were collected on October 27, 2005 by AeroMetric, Inc., under contract by Rodney P. Kinney and Associates, Inc. The complete, classified LiDAR dataset was purchased by the State of Alaska Division of Geological & Geophysical Surveys in 2013 in support of coastal vulnerability mapping efforts. For the purposes of open access to LiDAR datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license.\n\nThe DGGS metadata standard extends the FGDC standard to include elements that are required to facilitate our internal data management. These elements, referred to as \"layers,\" group and describe files that have intrinsic logical or topological relationships and correspond to subdirectories within the data distribution package. The metadata layer provides an FGDC metadata file and may include other documentation files. Attribute information for each data layer is described in this metadata file under the \"Entity_and_Attribute_Information\" section. Data layer contents:\n>point cloud data - all returns - classified: Classified (ASPRS standard) LiDAR values for all returns (distributed in LAZ format)\n>las-index: polygons that serve as an index to the spatial location and extent of each point cloud (LAS) bin\n>border: polygon that encompasses the maximum geographic extent of the data observations\n>dsm:\tdigital surface model (first return), 3 meter resolution, single band raster\n>dsm_hs:\thillshade of digital surface model (first return), 3 meter resolution, three band raster\n>dtm:\tdigital terrain model (bare earth), 3 meter resolution, single band raster\n>dtm_hs:\thillshade of digital terrain model (first return), 3 meter resolution, three band raster\n\n\n\n\n\n\n2005\n\n\n2006\n\n\n2013\n\n\n2014\n\n\n\nground condition\n\n\ncomplete\nNone planned\n\n\n\n-160.834750\n-160.748784\n63.917474\n63.844708\n\n\n\n\nISO 19115 Topic Category\ngeoscientificInformation\n\n\nAlaska Division of Geological & Geophysical Surveys\nCoastal\nCoastal and River\nGeomorphology\nLiDAR\nLiDAR LAS File Format\nPoint Cloud Data\nRemote Sensing\nSurface\n\n\nAlaska Division of Geological & Geophysical Surveys\nUnalakleet Quadrangle\n\n\nWalker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America\nHolocene\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\n\n\nAlaska Division of Geological & Geophysical Surveys\n\nGIS Manager\n\nmailing and physical\n
3354 College Road
\nFairbanks\nAK\n99709-3707\nUSA\n\n(907)451-5020\ndggsgis@alaska.gov\n8 am to 4:30 pm, Monday through Friday, except State holidays\n\n\nThis publication is funded with qualified outer continental shelf oil and gas revenues by the Coastal Impact Assistance Program, U.S. Fish and Wildlife Service, U.S. Department of the Interior. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the opinions or policies of the U.S. Government. Mention of trade names or commercial products does not constitute their endorsement by the U.S. Government.\n\n\n\nAccuracy statements are based on areas of moderate terrain. Diminished accuracies are to be expected in areas of extreme terrain and dense vegetation. The accuracy of each point is expected to meet the vertical accuracy standard, however, derived products may be less accurate in extreme terrain and dense vegetation due to a lesser number of points defining the bare-earth in these areas. Questions regarding data accuracy can be best answered by AeroMetric/Quantum Spatial (Anchorage, Alaska) staff. The dataset was provided to us in LAS 1.1 format (not in LAS 1.3 format as noted in the delivery report.)\n\nQuality control and quality assurance ground survey points were collected by Rodney P. Kinney and Associates and supplied to AeroMetric.\nDGGS staff performed visual qualitative assessment to ensure data completeness. There are no void areas or missing data. Users should note that this dataset was acquired in 2005 and subsequently migrated to more modern specifications in 2013. Questions regarding data quality and completeness can be best answered by AeroMetric/Quantum Spatial (Anchorage, Alaska) staff. In addition to the classified point cloud data and delivery report provided by this release, AeroMetric also provided to DGGS: trajectory values, unclassified point cloud data, and a statistical summary of the elevation differences between LiDAR values and the ground survey points that were collected by Rodney P. Kinney and Associates)\n\n\nData products collected were acquired at or below 600 meters above mean terrain (AMT) and have a horizontal accuracy of 0.4 meters (per manufacturer's system specifications) with a nominal point spacing of .74 meters. No direct testing of the horizontal accuracy was feasible given this dataset.\n\n\nThe bare-earth classified LiDAR data were compared to Rodney P. Kinney and Associates check points throughout the project area. A statistical summary of the elevation differences was completed.\n\n\n\n\nCollection - The raw LiDAR data points were captured using AeroMetric's twin-engine Cessna equipped with a OPTECH 30/70 ALTM 70 kHz LiDAR acquisition system. The system includes differential GPS (DGPS) and inertial navigation systems (INS) to provide the necessary trajectory accuracy.\n2005\n\n\nProcessing - The airborne trajectory solution was processed in Applanix's POSPac v. 4.4, which first computes a 2 Hz Post Processed Kinematic (PPK) DGPS trajectory, then integrates the 200 Hz inertial measurement unit data for a final smoothed best estimate of trajectory (SBET). This SBET is then integrated with the LiDAR pulse data, utilizing Optech's REALM software, for a final x,y,z 'point cloud' dataset in industry standard LAS (LiDAR Accuracy Standard) format in the NAD83, Universal Transverse Mercator (UTM), Zone 4 Meters coordinate system with ellipsoidal heights.\n2006\n\n\nMigration and calibration - For this delivery, AeroMetric gathered the necessary data from the Unalakleet archive drive. Using GeoCue (V2012.1.27.5), AeroMetric converted the LAS swath data to NAVD88 GEOID09, NAD83 UTM Zone 4. The archived LAS swath data lacked return and scan angle information. Individual points were classified based on return number. Using proprietary in-house software, AeroMetric was able to use these classifications and timestamps to calculate the point return fields. Polygons were digitized along flight line edges to re-class the geometrically unreliable points near the extreme edge of the swath to help with calibration. An in-situ calibration was performed using the data collect for this project. The dataset was classified in each line separately for ground and other common features between lines, such as building roofs. This dataset was processed in TerraSolid's TerraMatch (Version 11.001) to compute corrections for roll, pitch, heading, and mirror scale. These corrections are applied in order to minimize discrepancies between flight lines.\n2013\n\n\nClassification - AeroMetric preformed automated classification of the bare-earth data from the LiDAR point cloud using a series of algorithms customized for the types of terrain encountered in the project. This step was followed by manual classification of any data which appeared to be poorly classified using the automated methods. Breaklines were digitized along coast and water bodies that met project standards listed above.\n2013\n\n\nVerification - Rodney P. Kinney (RPK) and Associates provided AeroMetric with Post Processed Kinematic (PPK) Quality Assurance and Quality Control (QAQC) data, to check the vertical accuracy of these LiDAR data. The 2006 control file had to be traslated by AeroMetric from GEOID99 to GEOID09. A comparison between the QAQC and the LiDAR point data were made using TerraScan, to determine any vertical bias in the data. An adjustment of 0.21 meters was applied to the LiDAR data in order to match the provided QAQC data.\n2013\n\n\nClassified LAS 1.1 files - AeroMetric created classified LAS 1.1 files using the client provided tiling scheme. The points within each tile are sorted sequentially in order of acquisition, and have adjusted GPS timestamps. Note: that the Acquisition and Processing Report provided by AeroMetric incorrectly cites the deliverable format as LAS 1.3.\n2013\n\n\nFile compression - LAS files were compressed to LAZ format to facilitate online distribution\n2014\n\n\nDigital Surface Model (DSM) - The digital surface model (first returns) was generated from LAS files in ArcGIS using the LASD to Raster Tool.\n2014\n\n\nDigital Terrain Model (DTM) - The digital terrain model (bare earth) was generated from LAS files in ArcGIS using the LASD to Raster Tool after filtering to only use ground points.\n2014\n\n\nHillshade images were derived from the digital terrain model and digital surface model with Global Mapper and exported as 3 Band GeoTIFFs.\n2014\n\n\n\n\n\n\n\nUniversal Transverse Mercator\n\n4\n\n0.999600\n-159\n0\n500000.000000\n0\n\n\n\n\ncoordinate pair\n\n0.01\n0.01\n\nmeters\n\n\n\nNorth American Datum of 1983\nGeodetic Reference System 80\n6378137\n298.257222101\n\n\n\n\nNAVD88, derived using GEOID09\n0.01\nMeters\nExplicit elevation coordinate included with horizontal coordinates\n\n\n\n\n\n\npoint_cloud_data\npoint cloud data - all returns - classified: Classified (ASPRS standard) LiDAR values for all returns; File format: LAS 1.1, distributed in LAZ format\nAeroMetric, Inc.\npoint cloud data - all returns - classified\n\n\n\n\nrdf2014-2-las-index\npolygons that serve as an index to the spatial location and extent of each point cloud (LAS) bin; File format: shapefile\nAeroMetric, Inc.\nlas-index\n\n\nNAME\nBin identification\nAeroMetric, Inc.\n\nAlpha numeric values that uniquely identify each LAS bin\n\n\n\n\n\nrdf2014-2-border\npolygon that encompasses the maximum geographic extent of the data observations; File format: shapefile\nAeroMetric, Inc.\nborder\n\n\n\n\nrdf_2014_2_dsm\ndigital surface model (first return), 3 meter resolution, single band raster\nAlaska Division of Geological & Geophysical Surveys\ndsm\n\n\n\n\nrdf_2014_2_dsm_hs\nhillshade of digital surface model (first return), 3 meter resolution, three band raster\nAlaska Division of Geological & Geophysical Surveys\ndsm_hs\n\n\n\n\nrdf_2014_2_dtm\ndigital terrain model (bare earth), 3 meter resolution, single band raster\nAlaska Division of Geological & Geophysical Surveys\ndtm\n\n\n\n\nrdf_2014_2_dtm_hs\nhillshade of digital terrain model (first return), 3 meter resolution, three band raster\nAlaska Division of Geological & Geophysical Surveys\ndtm_hs\n\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\nRDF 2014-2\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\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 by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other 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. 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 the exact shipping amount.\nContact DGGS for current pricing\n\n\n\n\nLidar point cloud data and derivative files\n\n\n\n\n\nhttp://dx.doi.org/10.14509/27121\n\n\n\n\n\nFree download\n\n\n\n20141208\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"}