Metadata: Identification_Information: Citation: Citation_Information: Originator: Ann E. Gibbs Originator: Alexander G. Snyder Originator: Nora M. Nieminski Publication_Date: 20260102 Title: Shorelines from 1949 to 2015 for the northwest coast of Alaska (Cape Prince of Wales to Kotlik River) used in shoreline change analysis Geospatial_Data_Presentation_Form: vector digital data (polyline) Series_Information: Series_Name: data release Issue_Identification: 10.5066/P1RYHDR7 Publication_Information: Publication_Place: U.S. Geological Survey, Pacific Coastal and Marine Science Center, Santa Cruz Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: https://doi.org/10.5066/P1RYHDR7 Larger_Work_Citation: Citation_Information: Originator: Ann E. Gibbs Originator: Alexander G. Snyder Originator: Nora M. Nieminski Publication_Date: 2026 Title: National assessment of shoreline change: A GIS compilation of vector shorelines (1949 to 2015) and associated shoreline change data for the west coast of Alaska, Cape Prince of Wales to Kotlik River Series_Information: Series_Name: data release Issue_Identification: 10.5066/P1RYHDR7 Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested Citation: Gibbs, A.E., Snyder, A.G., Nieminski, N.M. 2026, National assessment of shoreline change: A GIS compilation of vector shorelines (1949 to 2015) and associated shoreline change data for the west coast of Alaska, Cape Prince of Wales to Kotlik River: U.S. Geological Survey data release, https://doi.org/10.5066/P1RYHDR7. Online_Linkage: https://doi.org/10.5066/P1RYHDR7 Description: Abstract: This dataset includes historical shoreline positions that span up to 66 years, from 1949 to 2015, for the west coast of Alaska between Cape Prince of Wales and the Kotlik River. Shorelines were compiled from aerial orthophotographs (U.S. Geological Survey (USGS); State of Alaska Division of Natural Resources, Division of Geological and Geophysical Surveys). Historical shoreline positions serve as easily understood features that can be used to describe the movement of beaches through time. These data are used to calculate rates of shoreline change. Rates of long-term (greater than 60 years) and short-term (less than 40 years) shoreline change were generated in a GIS using the Digital Shoreline Analysis System (DSAS) version 5.1.2. DSAS uses a measurement baseline method to calculate rate-of-change statistics. Transects are cast from the reference baseline to intersect each shoreline, establishing measurement points used to calculate shoreline change rates. Purpose: Coastal erosion is a persistent process along most open-ocean shores of the United States and affects both developed and natural coastlines. Along the coast of Alaska, coastal erosion is widespread and threatens communities, infrastructure, and coastal habitat. As the coast changes, there are many ways that change can affect coastal communities, habitats, and the physical characteristics of the coast including beach erosion, shoreline retreat, land loss, and damage to infrastructure. The U.S. Geological Survey (USGS) is responsible for conducting research on coastal change hazards, understanding the processes that cause coastal change, and developing models to forecast future change. To understand and adapt to shoreline change, accurate information regarding the past and present configurations of the shoreline is essential, and a comprehensive, nationally consistent analysis of shoreline movement is needed. To meet this national need, the USGS is conducting an analysis of historical shoreline changes along open-ocean coasts of the United States and parts of the Great Lakes. This dataset is one in a series of regionally focused reports on historical shoreline change. As more data are gathered, periodic updates are made, which provide information that can be used in multidisciplinary assessments of coastal change hazards. Supplemental_Information: Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the Alaska Division of Geological & Geophysical Surveys or the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the dataset in nonproprietary form, as well as in Esri format, this metadata file may include some Esri-specific terminology. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 1949 Ending_Date: 2015 Currentness_Reference: ground condition Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -168.0921 East_Bounding_Coordinate: -160.7629 North_Bounding_Coordinate: 65.6001 South_Bounding_Coordinate: 63.0317 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: oceans Theme_Keyword: environment Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: Distributions Theme_Keyword: Physical/Chemical Features Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: coastal processes Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: shoreline accretion Theme_Keyword: shoreline erosion Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: U.S. Geological Survey Theme_Keyword: USGS Theme_Keyword: Coastal and Marine Hazards and Resources Program Theme_Keyword: CMHRP Theme_Keyword: Pacific Coastal and Marine Science Center Theme_Keyword: PCMSC Theme_Keyword: Shoreline Theme_Keyword: Shoreline change Theme_Keyword: Digital Shoreline Analysis System Theme_Keyword: DSAS Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:68bf176dd4be023bd943d04c Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: State of Alaska Place_Keyword: Bering Sea Place_Keyword: Norton Sound Place_Keyword: Brevig Mission Place_Keyword: Teller Place_Keyword: Nome Place_Keyword: Elim Place_Keyword: Golovin Place_Keyword: Shaktoolik Place_Keyword: Unalakleet Place_Keyword: Stebbins Place_Keyword: Saint Michael Place: Place_Keyword_Thesaurus: None Place_Keyword: United States of America Place_Keyword: Alaska Access_Constraints: No access constraints Use_Constraints: USGS-authored or produced data and information are in the public domain from the U.S. Government and are freely redistributable with proper metadata and source attribution. These data are marked with a Creative Common CC BY 4.0 License, and users must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Please recognize and acknowledge the U.S. Geological Survey and the Alaska Division of Geological & Geophysical Surveys as the originators of the dataset and in products derived from these data. These data are not to be used for navigation. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Cross_Reference: Citation_Information: Originator: Emily A. Himmelstoss Originator: Rachel E. Henderson Originator: Meredith G. Kratzmann Originator: Amy S. Farris Publication_Date: 2021 Title: Digital Shoreline Analysis System (version 5.1) User Guide Other_Citation_Details: Himmelstoss, E.A., Henderson, R.E., Kratzmann, M.G., and Farris, A.S., 2021, Digital Shoreline Analysis System (version 5.1) User Guide: U.S. Geological Survey Open-File Report 2021-1091. Online_Linkage: https://doi.org/10.3133/ofr20211091 Online_Linkage: https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas Cross_Reference: Citation_Information: Originator: Emily A. Himmelstoss Originator: Amy S. Farris Originator: Rachel E. Henderson Originator: Meredith G. Kratzmann Originator: Ayhan Ergul Originator: Ouya Zhang Originator: Jessica L. Zichichi Originator: E. Robert Thieler Publication_Date: 2018 Title: Digital Shoreline Analysis System (version 5.1): U.S. Geological Survey Software Other_Citation_Details: Current software at time of use was 5.1. The second link directs to the DSAS project page. Online_Linkage: https://code.usgs.gov/cch/dsas/-/tree/v5.1?ref_type=tags Online_Linkage: https://www.usgs.gov/centers/whcmsc/science/digital-shoreline-analysis-system-dsas Cross_Reference: Citation_Information: Originator: Jin-Si Over Originator: Andrew C. Ritchie Originator: Christine J. Kranenburg Originator: Jenna A. Brown Originator: Daniel D. Buscombe Originator: Tom Noble Originator: Christopher R. Sherwood Originator: Jonathan A. Warrick Originator: Phillipe A. Wernette Publication_Date: 2021 Title: Processing Coastal Imagery With Agisoft Metashape Professional Edition, Version 1.6—Structure From Motion Workflow Documentation Online_Linkage: https://pubs.usgs.gov/publication/ofr20211039 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The data provided here are a compilation of shorelines from multiple sources, spanning 66 years. The attributes in this table record positional and measurement uncertainties and datum offsets calculated during the process of extracting the shoreline from the orthoimagery data as described in the process steps. The attributes are based on the requirements of the Digital Shoreline Analysis System (DSAS) software and have gone through a series of quality assurance procedures. Logical_Consistency_Report: Adjacent shoreline segments do not overlap and are not necessarily continuous. Shorelines were quality checked for accuracy. Any slight offsets between adjacent segments due to georeferencing and digitizing error are taken into account in the uncertainty of the shoreline position, as reported in this metadata file. Completeness_Report: This shoreline file is complete and contains all shoreline segments used to calculate shoreline change rates along sections of the specified Alaska coastal region where shoreline position data were available. These data adequately represented the shoreline position at the time of the survey. Remaining gaps in these data are a consequence of non-existing data or existing data that did not meet quality assurance standards. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal positional accuracy for this dataset is composed of three contributing factors: georeferencing error, digitization error, and the water line position uncertainty. The georeferencing error was estimated by identifying the same features in imagery from each time period (1950s, 1980s, and 2015), measuring the horizontal distance between the same feature in different imagery datasets, then calculating the RMSE for each imagery processing region for the 1950s and 1980s datasets. These values ranged from 3.12 to 3.86 meters for 1950s and 2.42 to 3.89 meters for the 1980s. The georeferencing error for all 2015 imagery was reported by contractor (Fairbanks Fodar) to be 0.3 meters. The digitization error is the variability in the digitized location of the vector shoreline. The digitization error was determined to be 3 meters for the 1950s imagery, 3 meters for the 1980s imagery, and 2 meters for the 2015 imagery. The uncertainty of the position of the water line at the time of imagery capture was calculated by dividing the minimum and maximum water level deviations from mean high water, using the NOAA Tide Predictions based on the tidal stations at Unalakleet (9468333) and Nome (9468756), by the estimated shoreface slope (1:20). These three components were added in quadrature. The resulting horizontal positional accuracy ranged from 2.13 meters to 8.93 meters. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Originator: NASA AMES Research Center Publication_Date: 2023 Title: Aerial photo single frames, color-infrared Alaska High-Altitude Aerial Photography Geospatial_Data_Presentation_Form: Raster Digital Data Set Online_Linkage: https://doi.org/10.5066/F7610XKM Type_of_Source_Media: Digital Data (.tif) Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19800710 Ending_Date: 19850801 Source_Currentness_Reference: ground condition at time data were collected Source_Citation_Abbreviation: 1980s imagery Source_Contribution: 1980s imagery was used to delineate the instantaneous land-water interface shoreline. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Originator: U.S. Air Force Originator: U.S. Navy Publication_Date: 2023 Title: Aerial photo single frames, black and white Alaska aerial photography Geospatial_Data_Presentation_Form: Raster Digital Data Set Online_Linkage: https://doi.org/10.5066/F7610XKM Type_of_Source_Media: Digital Data (.tif) Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19490901 Ending_Date: 19520907 Source_Currentness_Reference: ground condition at time data were collected Source_Citation_Abbreviation: 1950s imagery Source_Contribution: 1950s imagery was used to delineate the instantaneous land-water interface shoreline. Source_Information: Source_Citation: Citation_Information: Originator: Overbeck, J.R. Originator: Hendricks, M.D Originator: Kinsman,N.E.M. Publication_Date: 2016 Title: Photogrammetric digital surface models and orthoimagery for 26 coastal communities of western Alaska Geospatial_Data_Presentation_Form: Raster Digital Data Set Publication_Information: Publication_Place: online Publisher: Alaska Division of Geological & Geophysical Surveys Online_Linkage: http://dggs.alaska.gov/pubs/id/29548 Type_of_Source_Media: Digital Data (.tif) Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2015 Ending_Date: 2015 Source_Currentness_Reference: ground condition at time data were collected. Source_Citation_Abbreviation: 2015 imagery Source_Contribution: Fodar imagery was used to delineate approximate land-water interface. Source_Information: Source_Citation: Citation_Information: Originator: NOAA Center for Operational Oceanographic Products and Services (NOAA CO-OPS) Publication_Date: 2018 Title: Predicted Tide Data from CO-OPS September 1, 1949 – August 31, 2015 Geospatial_Data_Presentation_Form: .json file Publication_Information: Publication_Place: online Publisher: NOAA Center for Operational Oceanographic Products and Services Online_Linkage: https://api.tidesandcurrents.noaa.gov/api/prod/ Type_of_Source_Media: Digital Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 19490901 Ending_Date: 20150831 Source_Currentness_Reference: ground condition at time data were collected. Source_Citation_Abbreviation: NOAA tide predictions Source_Contribution: Predicted tide data were used to account for uncertainty in shoreline position. Process_Step: Process_Description: The orthorectified 2015 imagery was obtained from Alaska Division of Geological and Geophysical Surveys. Process_Date: 2021 Process_Step: Process_Description: Aerial photo single frames from the 1950s and 1980s were identified and downloaded from USGS Earth Explorer. The 1950s imagery is black and white and part of multiple mapping projects. The 1980s imagery is colored near infrared and part of the Alaska High Altitude Aerial Photography Project. Additional information about the specific source imagery is available on USGS Earth Explorer and can be found using the specific attribute ENTITY_ID, which is also identified as the attribute “Source_a” in this dataset. Process_Date: 2023 Process_Step: Process_Description: 1950s and 1980s aerial photo single frames were used to generate a 3-dimensional model using structure from motion (SfM) methods in Agisoft Metashape v1.7, following the methods detailed by Over and others, 2021. Process_Date: 2023 Process_Step: Process_Description: Horizontal and vertical positions of ground control points (GCPs) were digitized from the 2015 imagery, using ArcGIS Pro v3.32. These consisted of features that were visible in the 1950s, 1980s, and 2015 imagery. Process_Date: 2023 Process_Step: Process_Description: Ground control points (GCPs) were added to the structure from motion (SfM) model using Agisoft Metashape v1.7 to georeference and further refine the accuracy of the SfM model, following the methods detailed in Over and others, 2021. Process_Date: 2023 Process_Step: Process_Description: Georeferenced, orthorectified imagery mosaics for the 1950s and 1980s were generated and exported as 1 meter resolution GeoTIFFs, using Agisoft Metashape v1.7, following the methods detailed by Over and others, 2021. Process_Date: 2024 Process_Step: Process_Description: Vector shorelines, including land water interface, wet dry line, and vegetation line, were identified in the georeferenced orthoimagery and digitized using ArcGIS Pro version 3.32 at a scale of 1:1,500 or less. Process_Date: 2025 Process_Step: Process_Description: The name of the source imagery used to determine the shoreline was added to the shoreline shapefile using a shapefile that contained the boundaries of the source imagery to split the polyline segments into distinct records. Process_Date: 2025 Process_Step: Process_Description: Shoreline uncertainty values were calculated in Matlab version 2024b using tide predictions from NOAA Tide Predictions (NOAA, 2025), then exported to a table and appended to the shapefile of shorelines using the 'Join' tool in ArcGIS Pro version 3.32. For more information see Horizontal_Positional_Accuracy_Report section above. Process_Date: 2025 Process_Step: Process_Description: The shoreline shapefile was imported into a personal geodatabase in ArcCatalog v10.8.1 by right-clicking on the geodatabase > Import for use with the Digital Shoreline Analysis System (DSAS) software to perform rate calculations. Process_Date: 2024 Process_Step: Process_Description: The shoreline feature class was used as the input within the Digital Shoreline Analysis System (DSAS) software to perform rate calculations. Process_Date: 2025 Process_Step: Process_Description: The shoreline feature class was exported from a personal geodatabase to a shapefile in ArcCatalog v10.8.1 by performing a right-mouse click on the data layer > export > to shapefile (single). Process_Date: 2025 Process_Step: Process_Description: The exported shoreline shapefile was reprojected in Esri's ArcGIS Pro v3.4.3 > Data Management Tools > Projections and Transformations > Project. Parameters: input projection = NAD 1983 UTM Zone 3N; output projection = geographic coordinates (WGS84); transformation = WGS_1984_(ITRF00)_To_NAD_1983. Process_Date: 2025 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 3760 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0000001 Longitude_Resolution: 0.0000001 Geographic_Coordinate_Units: Decimal seconds Geodetic_Model: Horizontal_Datum_Name: D_WGS_1984 Ellipsoid_Name: WGS 84 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Attribute Table Entity_Type_Definition: Table containing attribute information associated with the dataset. Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: FID Attribute_Definition: Index number unique to each record in the attribute table. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry Attribute_Definition_Source: Esri Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Polyline ZM Enumerated_Domain_Value_Definition: ESRI polyline shapefile Enumerated_Domain_Value_Definition_Source: Esri Attribute: Attribute_Label: DATE_ Attribute_Definition: Date of survey (MM/DD/YYYY), as indicated on source material from which shoreline position was digitized. Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 09/01/1949 Range_Domain_Maximum: 08/31/2015 Attribute_Units_of_Measure: MM/DD/YYYY Attribute: Attribute_Label: Year_ Attribute_Definition: Year of survey (YYYY) as indicated on source material from which shoreline position was digitized. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1949 Range_Domain_Maximum: 2015 Attribute_Units_of_Measure: Year Attribute: Attribute_Label: UNCY Attribute_Definition: Total shoreline position uncertainty, in meters. Actual shoreline position is within the range of this value. The uncertainty was determined as described in the Horizontal_Positional_Accuracy_Report above. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2.13 Range_Domain_Maximum: 8.93 Attribute_Units_of_Measure: Meters Attribute: Attribute_Label: ShoreProxy Attribute_Definition: Shoreline feature digitized Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: LWI Enumerated_Domain_Value_Definition: The instantaneous land-water interface observed in the imagery Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: VL Enumerated_Domain_Value_Definition: The seaward-most vegetation line observed in the imagery Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: WDL Enumerated_Domain_Value_Definition: The wet-dry line observed in the imagery. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: ShoreType Attribute_Definition: A shoreline type classification Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Artificial Enumerated_Domain_Value_Definition: Coastal type where the natural shoreline is altered by emplacement of infrastructure, rocks, rip-rap, revetments, seawalls, groins, jetties, or construction of inlets. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Barrier Enumerated_Domain_Value_Definition: Coastal type that includes barrier island, barrier spit, or barrier beach Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Mainland Enumerated_Domain_Value_Definition: The mainland coast that is not a barrier or predominantly rocky. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Rocky mainland Enumerated_Domain_Value_Definition: Coastal type characterized by shear cliffs, bedrock, or beaches covered with large boulders. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Rocky mainland with beaches Enumerated_Domain_Value_Definition: Coastal type characterized as mostly rocky but with discontinuous sand, gravel, and boulder beaches. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Agency Attribute_Definition: Agency that provided shoreline feature and the data source used to digitize shoreline feature. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: State of Alaska Department of Natural Resources, Division of Geological and Geophysical Surveys Enumerated_Domain_Value_Definition: Alaska State agency that published the data. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: United States Geological Survey Enumerated_Domain_Value_Definition: Federal agency that published the data. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Source Attribute_Definition: Type of source imagery Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Orthoimagery Enumerated_Domain_Value_Definition: True-color RGB orthoimagery. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Aerial photo single frames, black and white aerial photography Enumerated_Domain_Value_Definition: Aerial single frame imagery obtained from U.S. Geological Survey’s Earth Explorer. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Aerial photo single frames, color-infrared Alaska High-Altitude Aerial Photography (AHAP) Enumerated_Domain_Value_Definition: Aerial single frame imagery obtained from U.S. Geological Survey’s Earth Explorer. Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey Attribute: Attribute_Label: Source_a Attribute_Definition: Specific source ID of data used to digitize shoreline feature. Attribute_Definition_Source: U.S. Geological Survey Attribute_Domain_Values: Unrepresentable_Domain: Source data IDs are assigned by the data providers Attribute: Attribute_Label: SHAPE_Leng Attribute_Definition: Length of shoreline segment in meters Attribute_Definition_Source: Esri Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.048 Range_Domain_Maximum: 10640.413 Attribute_Units_of_Measure: meters Overview_Description: Entity_and_Attribute_Overview: The entity and attribute information provided here describes the tabular data associated with the dataset. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the dataset. Entity_and_Attribute_Detail_Citation: The entity and attribute information were generated by the individual and/or agency identified as the originator of the dataset. Please review the rest of the metadata record for additional details and information. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - Science Base Contact_Address: Address_Type: mailing and physical address Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Country: CA Contact_Voice_Telephone: 888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: These data are available in shapefile format contained in a single zip file, which also includes CSDGM FGDC-compliant metadata. Distribution_Liability: Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS) and the Alaska Division of Geological & Geophysical Surveys (DGGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Vector Digital Dataset (Polyline) Format_Version_Number: ArcGIS Pro v3.4.3 Format_Specification: Esri polyline shapefile Format_Information_Content: Zip file containing a shapefile of digitized shoreline positions from 1949 to 2015 for the northwest coast of Alaska (Cape Prince of Wales to Kotlik River) and associated metadata. File_Decompression_Technique: Use WinZip or equivalent Transfer_Size: 2.44 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P1RYHDR7 Access_Instructions: Data can be downloaded using the Network_Resource_Name link and selecting the specific Child Items title page. Fees: None. Technical_Prerequisites: These data are available in a polyline shapefile format. The user must have software to read and process the data components of a shapefile. Metadata_Reference_Information: Metadata_Date: 20260102 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Coastal and Marine Science Center Contact_Person: PCMSC Science Data Coordinator Contact_Address: Address_Type: mailing and physical Address: 2885 Mission Street City: Santa Cruz State_or_Province: CA Postal_Code: 95060 Contact_Voice_Telephone: 831-427-4747 Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998