{"action":"create","ckan_id":null,"date_created":"Wed, 18 Mar 2026 06:14:23 GMT","date_finished":null,"harvest_job_id":"1e284e2c-942c-40e1-a831-c420bda7948f","harvest_source_id":"f4c7bbab-c7ef-4277-a7d3-c25b78854814","id":"67223801-f560-4aa8-a2bb-2fa352be873e","identifier":"https://dggs.alaska.gov/webpubs/metadata/DDS7v2.xml","parent_identifier":null,"source_hash":"2ad0d5711096252c109554799a2f76ece5ab26a57e6b525b58bc4a77a0dcc8a5","source_raw":"Horen, K.C.Nieminski, N.M.DGGS Staff2025Alaska Coastal Profile Tool (ACPT)dataDigital Data SeriesDDS 7 v.2Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys3 phttps://doi.org/10.14509/31747Alaska Coastal Profile Tool (ACPT), Digital Data Series 7 v.2, provides shoreface elevation measurements collected by various stakeholders since the 1960s; many of which are unpublished or inaccessible. Since May 30, 1975, Alaska Division of Geological & Geophysical Surveys (DGGS) staff and others have compiled statewide elevation profiles to preserve historical coastal data, establish a centralized repository for future datasets, and support consistent, accurate, and repeatable observations along existing profiles. These shore-normal measurements are especially valuable when sites are revisited seasonally or interannually, helping to document change and assess vulnerability in Alaska's dynamic coastal environments. The database accommodates diverse data collection methods, including differential leveling, survey-grade global positioning system (GPS), and digital elevation model extraction. It incorporates contributions from community-led efforts and state, federal, and academic partners. For this version 2 release, DGGS integrated previously stored data with post-update acquisitions and reprocessed the data to improve the reliability of comparative analyses and the precision of future datasets. The database will be updated as new data become available, ensuring that derived products evolve. Its open-access design encourages broad participation in community-based coastal monitoring and fosters a deeper understanding of shoreline change across the state. All files can be downloaded from the Alaska Division of Geological & Geophysical Surveys website: http://doi.org/10.14509/31747The Alaska coastal profile database preserves and centralizes shoreline elevation measurements to document coastal change and assess climate-related vulnerability. Its purpose is to provide Alaska communities with consistent, accurate, and repeatable observations that support monitoring and decision-making in dynamic coastal environments.>alaska coastal profile tool: The Alaska coastal profile tool is an open\u2011access repository of shoreline elevation measurements collected across Alaska since the 1960s.19602025publication dateCompleteNone planned-171.790705-138.48685671.34828855.276746ISO 19115 Topic CategorygeoscientificInformationAlaska Division of Geological & Geophysical SurveysArctic CoastBathymetryBeach DepositsChannelClimateClimate ChangeCoastalCoastal and RiverCoastal ErosionCoastal PlainDatabaseDGGSDrainage PatternsElevationEmergency PreparednessEngineeringEngineering GeologyEnvironmentEnvironmentalErosionFloodFloodplainGeologicGeologic CommunicationsGeologic HazardsGeological ProcessGeologyGeomorphologyGeotechnicalGISHazardsImage InterpretationInundationMarineMethodsMitigation StrategiesRepeat Data CollectionSea Level ChangesSea Level RiseSediment TransportSedimentationShelfShorefaceStorm DepositsStorm SurgeSurfaceSurface WaterSurficialSurficial GeologyTidesUnconsolidated DepositsAlaska Division of Geological & Geophysical SurveysAlaskaBristol BayChignik LagoonDillinghamEkukGambellGolovinGoodnews BayGulf of AlaskaSeward PeninsulaSouthwest AlaskaWalker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of AmericaHoloceneThis 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).Any 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.Alaska Division of Geological & Geophysical SurveysGIS Managermailing and physical
3354 College Rd
FairbanksAK99709-3707USA907-451-5020dggsgis@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysThis work was made possible with U.S. Geological Survey, Coastal Marine Hazards Resource Program funding through an Alaska Climate Adaptation Science Center funding opportunity. The views and conclusions contained in this document are those of the author and should not be interpreted to represent the opinions or policies of the Alaska Division of Geological & Geophysical Surveys, the U.S. Geological Survey, or the U.S. Government. Mention of trade names or commercial products does not constitute endorsement by the Alaska Division of Geological & Geophysical Surveys, the U.S. Geological Survey, or the U.S. Government.Buzard, R.M.Overbeck, J.R.Maio, C.V.2019Community-based methods for monitoring coastal erosionInformation CircularIC 84Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys35 phttps://doi.org/10.14509/30182Buzard, R.M.Overbeck, J.R.Chriest, JonathanEndres, K.L.Plumb, E.W.2021Coastal flood impact assessments for Alaska communitiesReport of InvestigationRI 2021-1Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys16 phttps://doi.org/10.14509/30573Buzard, R.M.Turner, M.M.Miller, K.Y.Antrobus, D.C.Overbeck, J.R.2021Erosion exposure assessment of infrastructure in Alaska coastal communitiesReport of InvestigationRI 2021-3Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys29 phttps://doi.org/10.14509/30672DGGS Staff2015Alaska Shoreline Change ToolDigital Data SeriesDDS 9Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveyshttps://doi.org/10.14509/29504Gould, A.I.Kinsman, N.E.M.Hendricks, M.D.2015Guide to projected shoreline positions in the Alaska shoreline change toolMiscellaneous PublicationMP 158Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys11 phttps://doi.org/10.14509/29503Horen, K.C.Poisson, A.C.Christian, J.E.Nieminski, N.M.2024Methods for evaluating coastal flood impacts in Alaska communitiesMiscellaneous PublicationMP 177Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys13 phttps://doi.org/10.14509/31279Overbeck, J.R.2017Storm water level feature extraction from digital elevation models using intra-storm photographsReport of InvestigationRI 2017-6Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys10 phttps://doi.org/10.14509/29730Overbeck, J.R.2018Coastal flooding & erosion in AlaskaInformation CircularIC 68Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys2 phttps://doi.org/10.14509/30057Overbeck, J.R.Buzard, R.M.Turner, M.M.Miller, K.Y.Glenn, R.J.2020Shoreline change at Alaska coastal communitiesReport of InvestigationRI 2020-10Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys29 p., 47 sheetshttps://doi.org/10.14509/30552Overbeck, J.R.Kennedy, KatrinaHeim, Rebecca2017Color-indexed elevation maps for flood-vulnerable coastal communities in western AlaskaMiscellaneous PublicationMP 154 v. 2Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys23 p., 36 sheetshttps://doi.org/10.14509/29719Smith, J.R.Gray, GlennKinsman, N.E.M.2012Annotated bibliography series in support of coastal community hazard planning - northwest AlaskaMiscellaneous PublicationMP 147Fairbanks, Alaska, United StatesAlaska Division of Geological & Geophysical Surveys5 phttps://doi.org/10.14509/24084The accuracy of observations may vary by collection method and/or source. DGGS staff performed visual qualitative assessments of all data to ensure reasonableness and, where possible, quantitative comparisons. Horizontal and vertical accuracy are included as attributes of individual points in the Profile Points feature class.Gaps in profile data exist when DGPS points fail to post-process. This is generally due to receiver malfunctions or fewer observed satellites. When viewing profile elevation data, these gaps typically appear as unsampled sections. Older data, especially DGPS acquisitions, are generally less precise in adherence to individual profile geometry because these surveys were typically performed without the aid of defined profile transects to stake out. Newer data (typically post-2020) are more consistent with the profile geometry to which they are related. However, moderate imprecision remains possible, even with the aid of a defined profile transect.For this version 2 release, DGGS integrated previously stored data with post-update acquisitions and reprocessed the data to improve the reliability of comparative analyses and the precision of future datasets. The database will be updated as new data become available, ensuring that derived products evolve. Its open-access design encourages broad participation in community-based coastal monitoring and fosters a deeper understanding of shoreline change across the state.Horizontal point location accuracy is highly dependent on the data-collection method. For DGPS data, horizontal accuracies are reported as the Root Mean Square (RMS) error of the post-processed positions (typically less than 10cm). For DEM-derived profile elevation data, the horizontal positional accuracy depends on the point data's ground spacing. For elevation profiles obtained with various types of differential leveling techniques, the geographic accuracy of the entire profile location (approximately 10 cm to 1 km) is much poorer than the relative horizontal accuracy of the individual elevation points along each profile. Every effort has been made to infer appropriate horizontal accuracy for these varying methodologies based on all available information associated with the original data set.Vertical point location accuracy is highly dependent on the data-collection method. For DGPS data, vertical accuracies are reported as the Root-Mean-Square (RMS) error of the post-processed positions (typically less than 10 cm). For DEM-derived profile elevation data, vertical positional accuracy depends on the reported vertical accuracy of the underlying data source. For elevation profiles obtained with various types of differential leveling techniques, the vertical accuracy of the entire profile location (approximately 10 cm to 1 m) is much poorer than the relative horizontal accuracy of the individual elevation points along each profile. Every effort has been made to infer appropriate vertical accuracies for these varying methodologies based on all available information associated with the original data set.Geodatabase deployment - DGGS staff, in cooperation with the Alaska Ocean Observing System (AOOS), initiated the Alaska coastal profile database in 2014. The database was a universal repository of coastal elevation profiles compiled from original, published, and unpublished measurements across Alaska's coastal zone. Field data were collected with survey\u2011grade GPS using differential and real\u2011time kinematic methods, supplemented by digital elevation model extractions and manually added field information in ArcGIS. All positional information was transformed into the WGS84 datum, visually checked for consistency, and organized for interactive online mapping. Designed to accommodate diverse collection techniques, the database provided an accessible map interface that enabled easy access to existing profiles, promoted partner and community involvement in coastal monitoring, and was periodically updated as new data became available.2014Version update - For the version 2 update, DGGS staff redesigned the Alaska coastal profile database in 2025. The update incorporated data from the existing repository along with new measurements collected since the previous release. DGGS reprocessed the combined datasets to improve accuracy, organized observations by collocation to group measurements across time, and applied statistical methods to define consistent profiles. For each profile, DGGS calculated the centroid, performed principal component analysis to determine the primary axis, and normalized coordinates relative to the centroid. A covariance matrix was constructed, eigendecomposition identified major and minor axes, and the farthest observations were used to establish profile origins and directions. Linear distances were then calculated along the primary axis, producing computed profiles that reconciled past lower\u2011precision data and provided a framework to enhance the precision of future collections.2025vectorWGS84WGS 846378137298.257223563alaska coastal profile toolThe Alaska coastal profile tool is an open\u2011access repository of shoreline elevation measurements collected across Alaska since the 1960s.DGGSalaska coastal profile toolState of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveysmailing and physical
3354 College Road
FairbanksAK99709-3707USA907-451-5020907-451-5050dggspubs@alaska.gov8 am to 4:30 pm, Monday through Friday, except State holidaysPlease 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.DDS 7 v.2The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services 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, any failure thereof, or otherwise, and 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.DGGS 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.see http://dx.doi.org/10.14509/31747databasehttp://dx.doi.org/10.14509/31747Free download20251215Simone Montaynemailing and physical
3354 College Road
FairbanksAK99709-3707USA907-451-5020FGDC Content Standard for Digital Geospatial MetadataFGDC-STD-001-1998If the user has modified this metadata file in any way, the user is obligated to describe the types of modifications the user has made. User specifically agrees not to misrepresent this metadata file, 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.http://www.dggs.alaska.gov/metadata/dggs.extdggs metadata extensions","source_transform":null,"status":"error"}