{"action":"create","ckan_id":null,"date_created":"Wed, 28 Jan 2026 04:42:33 GMT","date_finished":null,"harvest_job_id":"57389b8d-43cf-462e-ae72-8757a66f3509","harvest_source_id":"f4c7bbab-c7ef-4277-a7d3-c25b78854814","id":"60459da6-4937-44f6-ba70-953cecbc07f0","identifier":"https://dggs.alaska.gov/webpubs/metadata/RDF2014-20.xml","parent_identifier":null,"source_hash":"186728fb9c3d9ee4f6f033563926dc55ec82788a9a0c8e3c90e9928513fb82b4","source_raw":"\n\n\n\n\nSoutherland, L.E.\nKinsman, N.E.M.\n2014\nLidar data for the community of Golovin, Alaska\nreport and digital data\n\nRaw Data File\nRDF 2014-20\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\n23 p.\nhttp://dx.doi.org/10.14509/29127\n\n\n\nThis publication presents lidar data collected over the community of Golovin, on the southern coast of the Seward Peninsula in western Alaska (fig. 1). The original data were collected on November 5, 2013, by Quantum Spatial. The complete, classified lidar dataset was purchased by the State of Alaska Division of Geological & Geophysical Surveys in 2014 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. The horizontal datum for this dataset is NAD83 (CORS96), the vertical datum is NAVD88, Geoid 09, and it is projected in UTM Zone 3 North. Units are in Meters. Data have been classified to Ground (class 2) and Default (class 1). Quantum Spatial collected the Golovin LiDAR data on 11/05/2013.\nFor 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), data have been classified to Ground (class 2) and Default (class 1).\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), 1 meter resolution, single band raster\n>dsm_hs:\thillshade of digital surface model (first return), 1 meter resolution, three band raster\n>dtm:\tdigital terrain model (bare earth), 1 meter resolution, single band raster\n>dtm_hs:\thillshade of digital terrain model (first return), 1 meter resolution, three band raster\n\n\n\n\n\n20131105\n2014\n\n\nground condition\n\n\ncomplete\nNone planned\n\n\n\n-163.048528\n-162.959765\n64.557070\n64.537851\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\nTopography\nDigital Surface Model (DSM)\nHillshade Image\nLAS Index Shapefile\nRaster Image\nShaded Relief\n\n\nAlaska Division of Geological & Geophysical Surveys\nGolovin\nSolomon Quadrangle\nSeward Peninsula\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 through 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 Quantum Spatial (Anchorage, Alaska) staff.\n\nShaded relief images have been visually inspected for data errors such as pits, border artifacts, and shifting. LiDAR flight lines have been examined to ensure consistent elevation values across overlapping flight lines. The Root Mean Square Error (RMSE) of line to line relative accuracy for this dataset is 0.035 m. Please see the LiDAR data report for a discussion of the statistics related to this dataset.\nLiDAR data has been collected and processed for all areas within the project study area. AKDGGS's area of interest (AOI) was larger in extent than the previous AOI for which the data was acquired. This resulted in small but unavoidable data gaps along the northern boundary and lower point densities in the eastern section of the AOI not specifically targeted during the acquisition. All discernible laser returns from the fall 2013 acquisition were processed to aid AKDGGS in assessing the topographic and geophysical properties of the study area to support storm monitoring.\n\n\nThe Optech Gemini system has a stated horizontal accuracy of 1/5500 x altitude. The Golovin lidar data was flown at 800m AGL resulting in a horizontal accuracy of 15 cm.\n\n\nThe Root Mean Square Error (RMSE) of the vertical accuracy of this dataset is 0.107 m. Accuracy was assessed using 15 ground survey points. Please see the lidar data report for a discussion of the statistics related to this dataset. The vertical accuracy of the lidar dataset was independently evaluated by DGGS using control points (n=10) that were collected by DGGS during the course of 2012 fieldwork. The standard deviation of the differences between these independent control points and the lidar point-cloud data confirmed the vertical accuracy reported by Quantum Spatial in the 2014 delivery report.\n\n\n\n\n\nAcquisition. Quantum Spatial collected the Golovin lidar data on 11/05/2013. The survey used a Optech Gemini laser system mounted in a Piper Navajo. Data was collected using a single pulse flight plan. Ground level GPS and aircraft IMU were collected during the flight.\nOptech Gemini Instrument Parameters:\nBeam diameter: 26 cm,\nPulse rate: 70 kHz,\nMaximum returns: 4,\nField of view (FOV): 40 degrees,\nBeam wavelength: 1064 nm,\nFrequency of GPS sampling: 2 Hz,\nFrequency of IMU sampling: 200 Hz,\nAGL: 800 m,\nAverage pulse density: 4\n\n20131105\n\n\n\n1. Flight lines and data were reviewed to ensure complete coverage of the study area and positional accuracy of the laser points.\n2. Laser point return coordinates were computed based on independent data from the lidar system, IMU, and aircraft.\n3. The raw lidar file was assembled into flight lines per return with each point having an associated x, y, and z coordinate.\n4. Visual inspection of swath to swath laser point consistencies within the study area were used to perform manual refinements of system alignment.\n5. Custom algorithms were designed to evaluate points between adjacent flight lines. Automated system alignment was computed based upon randomly selected swath to swath accuracy measurements that consider elevation, slope, and intensities. Specifically, refinement in the combination of system pitch, roll and yaw offset parameters optimize internal consistency.\n6. Noise (e.g., pits and birds) was filtered based on known elevation ranges and included the removal of any cycle slips.\n7. Using TerraScan and Microstation, ground classifications utilized custom settings appropriate to the study area.\n8. The corrected and filtered return points were compared to the RTK ground survey points collected to verify the vertical accuracy.\n9. Data were classified to Ground (class 2) and Default (class 1).\n\n20140916\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\n3\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 GEOID 12A\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\nQuantum Spatial\npoint cloud data - all returns - classified\n\n\n\n\nrdf2014-20-las-index\npolygons that serve as an index to the spatial location and extent of each point cloud (LAS) bin; File format: shapefile\nQuantum Spatial\nlas-index\n\n\nNAME\nBin identification\nQuantum Spatial\n\nAlpha numeric values that uniquely identify each LAS bin\n\n\n\n\n\nrdf2014-20-border\npolygon that encompasses the maximum geographic extent of the data observations; File format: shapefile\nQuantum Spatial\nborder\n\n\n\n\nrdf_2014_20_dsm\ndigital surface model (first return), 1 meter resolution, single band raster\nAlaska Division of Geological & Geophysical Surveys\ndsm\n\n\n\n\nrdf_2014_20_dsm_hs\nhillshade of digital surface model (first return), 1 meter resolution, three band raster\nAlaska Division of Geological & Geophysical Surveys\ndsm_hs\n\n\n\n\nrdf_2014_20_dtm\ndigital terrain model (bare earth), 1 meter resolution, single band raster\nAlaska Division of Geological & Geophysical Surveys\ndtm\n\n\n\n\nrdf_2014_20_dtm_hs\nhillshade of digital terrain model (first return), 1 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 2014-20\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\nLAS files\n\n\n\n\n\nhttp://dx.doi.org/10.14509/29127\n\n\n\n\n\nFree download\n\n\n\n20141212\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"}