Shoreline data for Ocean Beach, San Francisco, California, 2004 to 2021

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Daniel J. Hoover
Originator: Alex G. Snyder
Originator: Patrick L. Barnard
Originator: Jeff E. Hansen
Originator: Jonathan A. Warrick
Publication_Date: 20241108
Title:

Shoreline data for Ocean Beach, San Francisco, California, 2004 to 2021

Geospatial_Data_Presentation_Form: vector digital data (polyline)
Series_Information:

Series_Name: data release
Issue_Identification: 10.5066/P13CAWLM

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

Other_Citation_Details:

Suggested Citation: Hoover, D.J., Snyder, A.G., Barnard, P.L., Hansen, J.E. and J.A. Warrick, 2024, Shoreline data for Ocean Beach, San Francisco, California, 2004 to 2021: U.S. Geological Survey data release, https://doi.org/10.5066/P13CAWLM.

Online_Linkage: https://doi.org/10.5066/P13CAWLM

Description:

Abstract:

This dataset contains historical shoreline positions (MHW - local Mean High Water, and MSL - local Mean Sea Level) that span 17 years, from 2004 to 2021, for Ocean Beach, San Francisco, California, USA. Shorelines were extracted from topographic elevation data collected by the USGS. Shoreline position data can be used to calculate rates of shoreline change (accretion or erosion) and to evaluate the performance of shoreline change models.

Purpose:

Coastal erosion is a persistent process along most open-ocean shores of the United States and affects both developed and natural coastlines. Ocean Beach is subject to strong seasonal wave energy and complex alongshore transport due to variable bathymetry and tidal currents associated with San Francisco Bay, resulting in variable erosion/accretion response alongshore, including a persistent erosion "hotspot" in the southern portion. 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. As more data are gathered, periodic updates will be made to this dataset, providing information that can be used in multidisciplinary assessments of global change impacts on shoreline change.

Supplemental_Information:

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20040407
Ending_Date: 20211206

Currentness_Reference: ground condition at time data were collected

Status:

Progress: In work
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -122.515054
East_Bounding_Coordinate: -122.495797
North_Bounding_Coordinate: 37.780722
South_Bounding_Coordinate: 37.672023

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:dc13032a-acd2-4851-97d4-9f1a38e68064

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: environment
Theme_Keyword: geoscientificInformation

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: coastal processes
Theme_Keyword: geospatial datasets
Theme_Keyword: environmental justice

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

Place:

Place_Keyword_Thesaurus: Geographic Names Information System (GNIS)
Place_Keyword: State of California
Place_Keyword: Ocean Beach
Place_Keyword: City of San Francisco

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. 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

Browse_Graphic:

Browse_Graphic_File_Name: OB MSL 2004 thru 2021.jpg
Browse_Graphic_File_Description: Map view of all MSL shorelines for the period 2004 through 2021
Browse_Graphic_File_Type: JPEG

Native_Data_Set_Environment: ArcGIS
Cross_Reference:

Citation_Information:

Originator: Patrick L. Barnard
Originator: Jeff E. Hansen
Originator: Li H. Erikson
Publication_Date: 2012
Title: Synthesis Study of an Erosion Hot Spot, Ocean Beach, California
Other_Citation_Details:

Barnard, P.L.; Hansen, J.E., and Erikson, L.H., 2012. Synthesis study of an erosion hot spot, Ocean Beach, California (USA). Journal of Coastal Research, 28(4), 903?922. West Palm Beach (Florida), ISSN 0749-0208

Online_Linkage: https://doi.org/10.2112/JCOASTRES-D-11-00212.1

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

The data provided here are a compilation of all available shorelines from 17 years of beach topographic surveys. Accuracy estimates reflect positional and measurement uncertainties calculated during the process of extracting the MHW and MSL contours from the topographic survey data as described in the process steps, including quality assurance procedures.

Logical_Consistency_Report:

Individual shoreline positions were quality checked for reasonableness (position relative to prior and subsequent shorelines) during data processing and shoreline extraction.

Completeness_Report:

Dataset is considered complete for the information presented. Users are advised to read the rest of the metadata record carefully for additional details.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

The horizontal accuracy of shoreline positions is affected by both the measurement uncertainty of the underlying point data and topographic survey methodology. For Ocean Beach MHW shorelines the mean positional uncertainty is about 0.75m (Barnard and others, 2012). The mean positional uncertainty for MSL shorelines has not been calculated but should be comparable to that calculated for MHW shorelines.

Lineage:

Process_Step:

Process_Description:

Global navigation satellite system (GNSS) point data were collected along the beach face using a GNSS receiver with an antenna mounted a fixed height above the beach surface.

Process_Date: 20211206

Process_Step:

Process_Description:

Point data elevations were adjusted in ArcGIS for the antenna offset to obtain beach surface elevations and reviewed for overall data quality.

Process_Date: 20211208

Process_Step:

Process_Description:

Quality-controlled point data were processed in ArcGIS to obtain a triangular interpolated network (TIN) which then was converted to a 2m grid of the 3-D beach surface.

Process_Date: 20211208

Process_Step:

Process_Description:

Local MHW (1.619m NAVD88) and MSL (0.975m NAVD88) shoreline contours were extracted from the 2m grid. Note that the alongshore extent of contours depends on the availability of survey data in the appropriate elevation range for some surveys contours are not continuous along the entire study area, and for four surveys (12/10/06, 1/16/07, 5/7/13, and 1/25/16) no MSL contour is available at all.

Process_Date: 20211208

Process_Step:

Process_Description:

Contours were cleaned to remove portions extrapolated outside the point coverage or through non-beach features, or to interpolate across short gaps.

Process_Date: 20240925

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: 4960

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:

UTM_Zone_Number: 10
Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.99960000
Longitude_of_Central_Meridian: -123.00000000
Latitude_of_Projection_Origin: 0.0
False_Easting: 500000.0
False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 0.0001
Ordinate_Resolution: 0.0001

Planar_Distance_Units: Meter

Geodetic_Model:

Horizontal_Datum_Name: North American Datum 1983
Ellipsoid_Name: GRS 1980
Semi-major_Axis: 6378137.0
Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Attribute Table
Entity_Type_Definition:

Table containing attribute information associated with the data set.

Entity_Type_Definition_Source: U.S. Geological Survey

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:

Sequentially unique whole numbers that are automatically generated for each shapefile

Attribute:

Attribute_Label: Shape
Attribute_Definition: Feature geometry
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the feature

Attribute:

Attribute_Label: ID
Attribute_Definition: Shoreline segment number
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain:

Sequentially unique whole numbers that are automatically generated for each shapefile

Attribute:

Attribute_Label: CONTOUR
Attribute_Definition: Contour elevation relative to the NAVD88 vertical datum
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.9749999
Range_Domain_Maximum: 1.6190000
Attribute_Units_of_Measure: m
Attribute_Measurement_Resolution: 0.0000001

Attribute:

Attribute_Label: Date_
Attribute_Definition: date of data collection
Attribute_Definition_Source: Producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 04/07/2004
Range_Domain_Maximum: 12/06/2021
Attribute_Units_of_Measure: MM/DD/YYYY
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: Accuracy
Attribute_Definition: Entity accuracy placeholder
Attribute_Definition_Source: Esri
Attribute_Domain_Values:

Unrepresentable_Domain:

Accuracy placeholders that are automatically generated as zero for each shapefile. Field retained to facilitate data use by external programs that require an Accuracy field.

Overview_Description:

Entity_and_Attribute_Overview:

The entity and attribute information provided here describes the tabular data associated with the data set. 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 data set. Note that attribute values listed above are for data visualization using geospatial software; attribute values may read differently in other platforms. Note also that the Date attribute format of MM/DD/YYYY is based on shapefiles generated in ArcGIS and is different from the folder data convention (YYYYMMDD) which was used to facilitate folder sorting by date

Entity_and_Attribute_Detail_Citation:

The entity and attribute information were generated by the individual and/or agency identified as the originator of the data set. 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 - 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 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), 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: Shapefile
Format_Version_Number: ArcGIS Desktop 10.8.1
Format_Specification: Esri polyline shapefile
Format_Information_Content:

These files (.cpg, .dbf, .prj,.sbn, .sbx, .shp, and .shx) are a collection of files with a common filename prefix and must be downloaded and stored in the same directory. Together they are the components of the shapefile and include FGDC CSDGM-compliant metadata.

File_Decompression_Technique: Use WinZip or equivalent
Transfer_Size: 25.6

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: https://doi.org/10.5066/P13CAWLM

Access_Instructions:

Data and metadata can be downloaded using the Network_Resource_Name link and scrolling down to the Location-Elevation Data section.

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: 20241108
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

This page is <https://cmgds.marine.usgs.gov/catalog/pcmsc/DataReleases/CMGDS_DR_tool/DR_P13CAWLM/OceanBeach_shorelines_metadata.html>