{"action":"create","ckan_id":null,"date_created":"Sat, 07 Mar 2026 20:45:50 GMT","date_finished":null,"harvest_job_id":"5146f61a-f575-4df8-8eeb-1e0f3906084a","harvest_source_id":"31f41541-38a0-400b-b240-10ebcb0acd9a","id":"a625fea3-7aff-4438-bae0-7bd3ddaa8df7","identifier":"https://dggs.alaska.gov/webpubs/metadata/RDF2019-10A.xml","parent_identifier":null,"source_hash":"07246a2abd30e618f1fca5473bdf164f84f0198bfc06e51fae8cefc83fee5766","source_raw":"\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Ted Stevens Anchorage International Airport, December 6, 2018\nimagery\n\nRaw Data File\nRDF 2019-10A\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30271\n\n\n\nThe State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced digital surface models (DSMs) and orthorectified aerial imagery (orthoimagery) over selected locations in the greater Anchorage area following the Mw 7.1 November 30, 2018, Anchorage earthquake. We selected areas of interest (AOIs) based on initial damage reports from the Alaska Department of Transportation & Public Facilities (DOT&PF) and the United States Geological Survey (USGS) in order to document earthquake effects. Aerial photographs collected December 5-6, 2018, were processed using Structure-from-Motion (SfM) photogrammetric techniques to create sub-meter DSMs and orthoimagery. This digital data set covers the Ted Stevens Anchorage International Airport and was collected on December 6, 2018. These data document ground conditions immediately following the 2018 Mw 7.1 Anchorage earthquake. For the purposes of open access to elevation and orthoimagery data sets throughout Alaska, this collection is being released as a Raw Data File with an open end-user license. The data and the data acquisition report are available from the DGGS website: https://elevation.alaska.gov/, http://doi.org/10.14509/30271.\nThe data release is one of a series of Alaska Division of Geological & Geophysical Surveys (DGGS) publications that provide digital surface models (DSMs) and orthorectified aerial imagery (orthoimagery) collected over selected locations in the greater Anchorage area following the Mw 7.1 November 30, 2018, Anchorage earthquake. We selected areas of interest (AOIs) based on initial damage reports from the Alaska Department of Transportation & Public Facilities (DOT&PF) and the United States Geological Survey (USGS) in order to document ground conditions immediately following the 2018 Mw 7.1 Anchorage earthquake.\n>digital surface model: Digital surface models (DSMs) represent all observable elevations within the project extent, capturing vegetation heights, building roofs, and other opaque objects. The raster DSM products in this collection are delivered in 32-bit float format. >orthoimage: Orthoimages are aerial photographs that have been geometrically corrected (orthorectified) for spatial accuracy, coordinating surface elevation with the sensor's location throughout the survey to create a geospatial product of uniform map scale. Collected imagery is assembled into composite mosaics for delivery.\n\n\n\n\n2018\n\n\nground condition\n\n\ncomplete\nNone planned\n\n\n\n-150.108073\n-149.931316\n61.212356\n61.090951\n\n\n\n\nISO 19115 Topic Category\ngeoscientificInformation\n\n\nAlaska Division of Geological & Geophysical Surveys\nAerial Photography\nDigital Surface Model (DSM)\nEarthquake Related Hazards\nEarthquake Related Slope Failure\nElevation\nEngineering\nFracturing\nGeologic\nGeologic Hazards\nGeological Process\nGeology\nGeomorphology\nGeotechnical\nHazards\nOrthoimagery\nPhotogrammetry\nRaster Image\nStructure From Motion\nSurficial Geology\nTopography\n\n\nAlaska Division of Geological & Geophysical Surveys\nAnchorage\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\nMetadata Manager\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\n\n\nThis project was funded by State of Alaska general funds. It coincides with and augments a United States Geological Survey QL2 lidar project flown by Kodiak Mapping and available through the DGGS Elevation Portal, https://elevation.alaska.gov/#61.17636:-149.62555:9 (DGGS Staff, 2013). We thank Seth K. Kiester for assistance with equipment and logistics.\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nNovember 30, 2018, Mw 7.1 Anchorage earthquake photogrammetry\n\nRaw Data File\nRDF 2019-10\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30270\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Campbell Lake Dam, December 5, 2018\n\nRaw Data File\nRDF 2019-10B\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30272\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of EauClaire Place, December 5, 2018\n\nRaw Data File\nRDF 2019-10C\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30273\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Eklutna Lake, December 5, 2018\n\nRaw Data File\nRDF 2019-10D\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30274\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Glenn Highway, December 5, 2018\n\nRaw Data File\nRDF 2019-10E\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30275\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Lake O the Hills neighborhood, December 5, 2018\n\nRaw Data File\nRDF 2019-10F\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30276\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Mackenzie Road, December 5, 2018\n\nRaw Data File\nRDF 2019-10G\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30277\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Minnesota Drive, December 5, 2018\n\nRaw Data File\nRDF 2019-10H\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30278\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Pittman Road, December 5, 2018\n\nRaw Data File\nRDF 2019-10I\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30279\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Potter Creek, December 6, 2018\n\nRaw Data File\nRDF 2019-10J\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30280\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Seward Highway, December 6, 2018\n\nRaw Data File\nRDF 2019-10K\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30281\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Ship Creek Dam, December 5, 2018\n\nRaw Data File\nRDF 2019-10L\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30282\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Vine Road, December 5, 2018\n\nRaw Data File\nRDF 2019-10M\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30283\n\n\n\n\nSalisbury, J.B.\nHerbst, A.M.\nWikstrom Jones, Katreen\n2019\nPhotogrammetric digital surface models and orthoimagery of Westchester Lagoon, December 5, 2018\n\nRaw Data File\nRDF 2019-10N\n\n\nFairbanks, Alaska, United States\nAlaska Division of Geological & Geophysical Surveys\n\nhttp://doi.org/10.14509/30284\n\n\n\n\n\nWe evaluated data quality based on vertical and horizontal accuracy compared to control data. See accompanying data acquisition report for a comprehensive listing of control points, checkpoints, accuracy statistics, and known anomalies.\n\nWe evaluated data quality based on vertical and horizontal accuracy compared to control data. Root mean square errors (RMSE) are reported in the accompanying acquisition report.\nData voids may be observed in the orthophotos. These gaps are a result from the orthorectification process, where pixels where spatially adjusted and the formerly occupied area was not interpolated. Because vertical elevation control is based on a 2015 lidar survey, these data are not suitable for calculating regional-scale vertical ground surface deformation.\n\n\nDue to the size and scale of the study area, conventional ground control methods were unobtainable within the timeframe of the survey. Instead, we extracted photo-identifiable horizontal ground control from Earth Systems Research Institute's (ESRI) orthoimagery map service (World Imagery [Clarity], https://www.arcgis.com/home/item.html?id=ab399b847323487dba26809bf11ea91a). The ESRI image service provided accuracies of 0.45 m-1 m.\n\n\nWe used a 2015 lidar survey for the Municipality of Anchorage, Alaska for vertical control on those same points. The 2015 Anchorage lidar data provide a vertical accuracy of 7.2 cm and are available through the DGGS Elevation Portal, https://elevation.alaska.gov/#61.17636:-149.62555:9\n\n\n\n\nAircraft and instrument - Alaska DGGS and the U.S. Bureau of Land Management (BLM) collected digital aerial photographs on December 5-6, 2018, from a fixed-wing (Cessna 180) airborne platform. Photographic survey plans included 60 percent side-lap and 80 percent end-lap coverage at variable above ground-level (AGL) heights, dependent upon the size/shapes of the AOIs and atmospheric conditions. We collected 7,238 photographs, covering 130 square kilometers with ground sample distances (GSDs) ranging from 3.6-22.8 cm. We used a Nikon D850 with an AF-Nikkor 24 mm lens to collect 45.4 Megapixel (8,256 x 5,504 pixels per image), 14-bit NEF.RAW (processed in Adobe Lightroom to 48-bit uncompressed TIFF photographs) and fine JPEGS. The aerial survey was controlled with an automatic flight control system and Aviatrix software, linking the camera shutter release with Global Navigation Satellite System (GNSS), Trimble R7 receiver, and a dual-band Novatel antenna mounted 0.96 m above the camera sensor.\n2018\n\n\nSFM data processing - An equipment malfunction during collection compromised sensor location data for each image. Because the camera shutter maintained synchronicity with GNSS input, surveyed data remained suitable for further processing with additional steps required. We processed and calibrated data from each of the 14 AOIs separately in Agisoft Metashape (Version 1.5.2 build 7838), beginning with photograph alignment and calibration of camera positions. We integrated ground control points (GCPs) in these initial procedures to achieve accurate georeferencing for all subsequent data products. Structure-from-Motion (SfM) processing continued with the construction of point clouds and surface models. Photographs were orthorectified using relative camera positions in conjunction with GCP-controlled surface models. The results were analyzed for quality control using additional checkpoints.\n2018\n\n\n\n\nraster\n\n\n\n\n\nUniversal Transverse Mercator\n\n5\n\n0.999600\n-153\n0\n500000.000000\n0\n\n\n\n\ncoordinate pair\n\n.00000001\n.00000001\n\nMeters\n\n\n\nNorth American Datum of 1983\nGRS 80\n6378137\n298.257222101000025\n\n\n\n\nNAVD88; Geoid12A; EPOCH 2010.00\n20\nmeters\nImplicit coordinate\n\n\n\n\n\n\ndigital surface model\nDigital surface models (DSMs) represent all observable elevations within the project extent, capturing vegetation heights, building roofs, and other opaque objects. The raster DSM products in this collection are delivered in 32-bit float format.\nAlaska Division of Geological & Geophysical Surveys (DGGS)\ndigital surface model\n\n\n\n\northoimage\nOrthoimages are aerial photographs that have been geometrically corrected (orthorectified) for spatial accuracy, coordinating surface elevation with the sensor's location throughout the survey to create a geospatial product of uniform map scale. Collected imagery is assembled into composite mosaics for delivery.\nAlaska Division of Geological & Geophysical Surveys (DGGS)\northoimage\n\n\n\n\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(907)451-5050\ndggspubs@alaska.gov\n8 am to 4:30 pm, Monday through Friday, except State holidays\n\n\nRDF 2019-10A\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\nimagery\n\n\n\n\n\nhttp://doi.org/10.14509/30271\n\n\n\n\n\nFree download\n\n\n\n20191230\n\n\n\nAlaska Division of Geological & Geophysical Surveys\nSimone Montayne\n\nMetadata Manager\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\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"}