1fe605bd-757f-421f-9e03-a499f37e5fff_source eng; USA utf8 dataset Simone Montayne 907-451-5020 3354 College Road Fairbanks AK 99709-3707 USA pointOfContact 2025-12-15 ISO 19115 Geographic Information - Metadata ISO 19115:2003/Cor.1:2006(E) Alaska Coastal Profile Tool (ACPT) 2025-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Horen, K.C. originator Nieminski, N.M. originator DGGS Staff originator https://doi.org/10.14509/31747 DATA Digital Data Series DDS 7 v.2 3 p Alaska 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7 v.2, provides shoreface elevation measurements collected by various stakeholders since the 1960s; many of which are unpublished or inaccessible.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/10.14509/31747 The 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. This 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. completed Alaska Division of Geological & Geophysical Surveys GIS Manager 907-451-5020 3354 College Rd Fairbanks AK 99709-3707 USA dggsgis@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays pointOfContact notPlanned Arctic Coast Bathymetry Beach Deposits Channel Climate Climate Change Coastal Coastal and River Coastal Erosion Coastal Plain Database DGGS Drainage Patterns Elevation Emergency Preparedness Engineering Engineering Geology Environment Environmental Erosion Flood Floodplain Geologic Geologic Communications Geologic Hazards Geological Process Geology Geomorphology Geotechnical GIS Hazards Image Interpretation Inundation Marine Methods Mitigation Strategies Repeat Data Collection Sea Level Changes Sea Level Rise Sediment Transport Sedimentation Shelf Shoreface Storm Deposits Storm Surge Surface Surface Water Surficial Surficial Geology Tides Unconsolidated Deposits theme Alaska Division of Geological & Geophysical Surveys Alaska Bristol Bay Chignik Lagoon Dillingham Ekuk Gambell Golovin Goodnews Bay Gulf of Alaska Seward Peninsula Southwest Alaska place Alaska Division of Geological & Geophysical Surveys Holocene temporal Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America The 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. otherRestrictions Use Constraints: 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. otherRestrictions Access Constraints: This 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). Community-based methods for monitoring coastal erosion 2019-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Buzard, R.M. originator Overbeck, J.R. originator Maio, C.V. originator https://doi.org/10.14509/30182 Information Circular IC 84 35 p crossReference Coastal flood impact assessments for Alaska communities 2021-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Buzard, R.M. originator Overbeck, J.R. originator Chriest, Jonathan originator Endres, K.L. originator Plumb, E.W. originator https://doi.org/10.14509/30573 Report of Investigation RI 2021-1 16 p crossReference Erosion exposure assessment of infrastructure in Alaska coastal communities 2021-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Buzard, R.M. originator Turner, M.M. originator Miller, K.Y. originator Antrobus, D.C. originator Overbeck, J.R. originator https://doi.org/10.14509/30672 Report of Investigation RI 2021-3 29 p crossReference Alaska Shoreline Change Tool 2015-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher DGGS Staff originator https://doi.org/10.14509/29504 Digital Data Series DDS 9 crossReference Guide to projected shoreline positions in the Alaska shoreline change tool 2015-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Gould, A.I. originator Kinsman, N.E.M. originator Hendricks, M.D. originator https://doi.org/10.14509/29503 Miscellaneous Publication MP 158 11 p crossReference Methods for evaluating coastal flood impacts in Alaska communities 2024-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Horen, K.C. originator Poisson, A.C. originator Christian, J.E. originator Nieminski, N.M. originator https://doi.org/10.14509/31279 Miscellaneous Publication MP 177 13 p crossReference Storm water level feature extraction from digital elevation models using intra-storm photographs 2017-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Overbeck, J.R. originator https://doi.org/10.14509/29730 Report of Investigation RI 2017-6 10 p crossReference Coastal flooding & erosion in Alaska 2018-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Overbeck, J.R. originator https://doi.org/10.14509/30057 Information Circular IC 68 2 p crossReference Shoreline change at Alaska coastal communities 2020-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Overbeck, J.R. originator Buzard, R.M. originator Turner, M.M. originator Miller, K.Y. originator Glenn, R.J. originator https://doi.org/10.14509/30552 Report of Investigation RI 2020-10 29 p., 47 sheets crossReference Color-indexed elevation maps for flood-vulnerable coastal communities in western Alaska 2017-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Overbeck, J.R. originator Kennedy, Katrina originator Heim, Rebecca originator https://doi.org/10.14509/29719 Miscellaneous Publication MP 154 v. 2 23 p., 36 sheets crossReference Annotated bibliography series in support of coastal community hazard planning - northwest Alaska 2012-01-01 publication Alaska Division of Geological & Geophysical Surveys Fairbanks Alaska, United States publisher Smith, J.R. originator Gray, Glenn originator Kinsman, N.E.M. originator https://doi.org/10.14509/24084 Miscellaneous Publication MP 147 5 p crossReference vector eng; USA geoscientificInformation -171.790705 -138.486856 55.276746 71.348288 1960-01-01 2025-01-01 >alaska coastal profile tool: The Alaska coastal profile tool is an open‑access repository of shoreline elevation measurements collected across Alaska since the 1960s. true database unknown State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 907-451-5020 907-451-5050 3354 College Road Fairbanks AK 99709-3707 USA dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Please 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. distributor see http://dx.doi.org/10.14509/31747 Free download http://dx.doi.org/10.14509/31747 database CSDGM IMPORT ERROR: No digtinfo/formcont information dataset Horizontal Positional Accuracy Report 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 Positional Accuracy Report 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. 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. 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. 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. This lineage was generated by the FGDC CSDGM to 19139 transformation 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‑grade GPS using differential and real‑time 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. 2014-01-01T00:00:00 Version 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‑precision data and provided a framework to enhance the precision of future collections. 2025-01-01T00:00:00 otherRestrictions Metadata Use Constraints: If 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. unknown This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2019-08-12T11:11:00 version of the FGDC CSDGM to ISO 19139 transform. Simone Montayne 907-451-5020 3354 College Road Fairbanks AK 99709-3707 USA pointOfContact