Metadata: Identification_Information: Citation: Citation_Information: Originator: Richard M. Buzard Originator: Li H. Erikson Originator: Ann E. Gibbs Originator: Alexander G. Snyder Originator: Anita C. Engelstad Originator: Cordell Johnson Originator: Alexander L. Nereson Originator: Daniel J. Nowacki Originator: Jin-Si R. Over Publication_Date: 20250708 Title: GNSS elevation data collected in 2024 on beaches and areas relevant to flood hazard studies in Alaska communities Geospatial_Data_Presentation_Form: comma-delimited text Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13YIWKC Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, California Publisher: U.S. Geological Survey Online_Linkage: https://doi.org/10.5066/P13YIWKC Larger_Work_Citation: Citation_Information: Originator: Li H. Erikson Originator: Ann E. Gibbs Originator: Richard M. Buzard Originator: Daniel J. Nowacki Originator: Alexander G. Snyder Originator: Anita C. Engelstad Originator: Cordell Johnson Originator: Alexander L. Nereson Originator: Jin-Si R. Over Originator: Paul Russel Originator: Colin Lyons Publication_Date: 2025 Title: In situ field data, Coastal Alaska, 2023 to 2025 Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P13YIWKC Publication_Information: Publication_Place: Pacific Coastal and Marine Science Center, Santa Cruz, CA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested Citation: Erikson L.H., Gibbs A.E., Buzard R.M., Nowacki D.J., Snyder A.G., Engelstad A.C., Johnson C., Nereson A.L., Over J.R., Russel, P., Lyons, C., 2025, In situ field data, Coastal Alaska, 2023 to 2025: U.S. Geological Survey data release, https://doi.org/10.5066/P13YIWKC. Online_Linkage: https://doi.org/10.5066/ P13YIWKC Description: Abstract: Elevation point data were collected in Deering, Golovin, Koyuk, Kotzebue, and Unalakleet, Alaska between June and September 2024. Coastal elevation profiles were measured at previously established locations. Other data points are categorized as base station, bathymetry, benchmark, camera calibration data, community-based monitoring profile, drainage observation, flood staff, ground control point, miscellaneous, and water level. The elevation data were collected with real-time kinematic global navigation satellite system (RTK-GNSS) equipment. Data are available in a single CSV file per community. For easting and northing coordinates, Deering, Golovin, and Kotzebue use UTM 3. Unalakleet and Koyuk use UTM 4. Purpose: This product was created to help advance coastal storm response and recovery in Alaskan coastal communities in the wake of the September 2022 extratropical Typhoon Merbok disaster. It is being used by the USGS to document existing conditions and support the development of dynamic flood models for more than 20 communities along the northwest coasts of Alaska. This product is intended for reuse by scientists, managers, and the general public. Supplemental_Information: Additional information about the field activity or activities from which these data were derived is available online at: https://cmgds.marine.usgs.gov/fan_info.php?fan=2024-634-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2024-635-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2024-637-FA Work was funded by Title VII of Division N in the Consolidated Appropriations Act, 2023 (Public Law 117–328) to support direct recovery and rebuilding decisions in the wake of declared disasters related to hurricanes and typhoons in 2022. For more information on these efforts, see https://www.usgs.gov/supplemental-appropriations-for-disaster-recovery-activities/typhoon-merbok-coastal-community. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20240607 Ending_Date: 20240911 Currentness_Reference: Ground condition at time data were collected Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -163.045634 East_Bounding_Coordinate: -160.784959 North_Bounding_Coordinate: 66.904291 South_Bounding_Coordinate: 63.870529 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:1299e64a-5ee3-4dfa-ac28-f1eed1b89d3c Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords Theme_Keyword: beach Theme_Keyword: shore Theme: Theme_Keyword_Thesaurus: Data Categories for Marine Planning Theme_Keyword: Bathymetry and Elevation Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: coastal processes Theme_Keyword: geomorphology Theme_Keyword: topography Theme_Keyword: geospatial datasets 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: Typhoon Merbok Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: State of Alaska Place_Keyword: Unalakleet Place_Keyword: Koyuk Place_Keyword: Kotzebue Place_Keyword: Deering Place_Keyword: Golovin Place_Keyword: Norton Sound Place_Keyword: Kotzebue Sound 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. Please recognize and acknowledge the U.S. Geological Survey as the originator(s) of the dataset and in products derived from these data. 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 Browse_Graphic: Browse_Graphic_File_Name: GNSS_ElevationData_locations.png Browse_Graphic_File_Description: Satellite image showing the locations where elevation data were collected. Browse_Graphic_File_Type: PNG Native_Data_Set_Environment: Trimble Business Center, National Geodetic Survey Online Positioning User Service (https://geodesy.noaa.gov/OPUS/) Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: No formal accuracy assessment was performed. Logical_Consistency_Report: All data fall within expected ranges. Completeness_Report: Dataset is considered complete for the information presented, as described in the abstract. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Horizontal accuracies of the base stations are computed using the National Geodetic Survey Online Positioning User Service. Horizontal errors of remaining points are computed during post-processing. Horizontal errors of all points are listed in the CSV and do not exceed 0.075 m. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Vertical accuracies of the base stations are computed using the National Geodetic Survey Online Positioning User Service. Vertical errors of remaining points are computed during post-processing. Vertical errors of all points are listed in the CSV and do not exceed 0.060 m. Lineage: Process_Step: Process_Description: Elevation data were collected with two GNSS receivers using a RTK system of base and rover. The base position was post-processed, and this correction was processed across baselines to all rover positions. Process_Date: 20240927 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: Post-processed in the Universal Transverse Mercator (UTM) zones referenced to North American Datum of 1983 with National Adjustment of 2011 (NAD83 [2011]). Eastings and northings are relative to the local UTM zone. Latitude and longitude are in WGS 1984. Elevations reference the North American Vertical Datum of 1988 using corrections from GEOID12B for Alaska (NAVD 88 [GEOID12B]). Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 4574 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.000001 Longitude_Resolution: 0.000001 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: WGS_1984 Ellipsoid_Name: WGS_1984 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257223563 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988 Altitude_Resolution: 0.001 Altitude_Distance_Units: Meters Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: GNSS_ElevationData_metadata_CommunityName_YYYYMM.csv Entity_Type_Definition: Coastal elevation measurements Entity_Type_Definition_Source: Producer defined Attribute: Attribute_Label: Point_ID Attribute_Definition: Unique identifying name Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: Automatically generated sequential numbers Attribute: Attribute_Label: Easting_m_UTM Attribute_Definition: Easting coordinate Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 397530.834 Range_Domain_Maximum: 607283.332 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: Northing_m_UTM Attribute_Definition: Northing coordinate Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 7083816.221 Range_Domain_Maximum: 7422775.023 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: UTM_Zone Attribute_Definition: UTM zone in which location is located Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: Descriptive text. Attribute: Attribute_Label: Elevation_m_NAVD88 Attribute_Definition: Elevation relative to NAVD88 (GEOID12B) Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.358 Range_Domain_Maximum: 51.886 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: Latitude Attribute_Definition: Latitude coordinate Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 63.870529 Range_Domain_Maximum: 66.904291 Attribute_Units_of_Measure: Decimal degrees Attribute_Measurement_Resolution: 0.000001 Attribute: Attribute_Label: Longitude Attribute_Definition: Longitude coordinate Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -163.045634 Range_Domain_Maximum: -160.784959 Attribute_Units_of_Measure: Decimal degrees Attribute_Measurement_Resolution: 0.000001 Attribute: Attribute_Label: Horizontal_Precision_m Attribute_Definition: Horizontal error Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.006 Range_Domain_Maximum: 0.075 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: Vertical_Precision_m Attribute_Definition: Vertical error Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.003 Range_Domain_Maximum: 0.060 Attribute_Units_of_Measure: Meters Attribute_Measurement_Resolution: 0.001 Attribute: Attribute_Label: Datetime_UTC Attribute_Definition: Start date and time in UTC (month/day/year hour:minutes) Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 06-07-2024 19:23 Range_Domain_Maximum: 09-12-2024 3:36 Attribute_Units_of_Measure: MM-DD-YYYY HH:MM Attribute: Attribute_Label: Notes Attribute_Definition: Description of point Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Unrepresentable_Domain: Descriptive text. Missing information is marked by NAN (not a number) Attribute: Attribute_Label: Profile_Line Attribute_Definition: Coastal elevation profile number. Where not applicable, a fill value of -9999 is used Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 102 Attribute_Units_of_Measure: dimensionless Attribute: Attribute_Label: Point_Category Attribute_Definition: Descriptive text of the point category Attribute_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Base station Enumerated_Domain_Value_Definition: the location of the GNSS-RTK survey base station Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Benchmark Enumerated_Domain_Value_Definition: location of recovered benchmark Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Camera calibration data Enumerated_Domain_Value_Definition: GNSS point taken to support calibration of camera system Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Community based monitoring profile Enumerated_Domain_Value_Definition: an elevation profile used by the community for erosion monitoring that is not a designated profile in the Alaska Coastal Profile Tool Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Drainage observation Enumerated_Domain_Value_Definition: GNSS point taken to support understanding of drainage, such as culverts, ditches, and bare earth elevation in dense vegetation. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Flood staff Enumerated_Domain_Value_Definition: location of a USGS installed flood staff. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Ground control point (GCP) Enumerated_Domain_Value_Definition: GNSS point taken as a control to support georeferencing Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Miscellaneous Enumerated_Domain_Value_Definition: GNSS point taken that does not fit into any of these categories or may not be needed. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Profile Enumerated_Domain_Value_Definition: GNSS point taken along a profile as numbered in the Alaska Coastal Profile Tool. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Water level Enumerated_Domain_Value_Definition: GNSS point taken at a still water elevation at a specified time. Enumerated_Domain_Value_Definition_Source: Producer defined Overview_Description: Entity_and_Attribute_Overview: The first line of the csv file is a header line. Entity_and_Attribute_Detail_Citation: U.S. Geological Survey Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey - CMGDS 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 Resource_Description: These data are available in csv format 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), 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: comma-delimited text Format_Information_Content: CSV contains location and elevation data File_Decompression_Technique: No compression applied. Transfer_Size: 0.6152 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://doi.org/10.5066/P13YIWKC Access_Instructions: Data can be downloaded using the Network_Resource_Name link then scrolling down to the Location-Elevation Data section. Fees: None. Technical_Prerequisites: The CSV data can be viewed with any text reading software. Metadata_Reference_Information: Metadata_Date: 20250708 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