Shoreline change rates along the coast of California from 1998 to 2016

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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: Patrick L. Barnard
Originator: Schuyler A. Smith
Originator: Amy C. Foxgrover
Publication_Date: 20201231
Title:

Shoreline change rates along the coast of California from 1998 to 2016

Geospatial_Data_Presentation_Form: point shapefile
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P91QSGXF

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/P91QSGXF
Online_Linkage:

https://www.sciencebase.gov/catalog/item/5f9317b882ce720ee2d5970a

Larger_Work_Citation:

Citation_Information:

Originator: Patrick L. Barnard
Originator: Schuyler A. Smith
Originator: Amy C. Foxgrover
Publication_Date: 2020
Title: California shorelines and shoreline change data, 1998-2016
Geospatial_Data_Presentation_Form: point and polyline shapefiles
Series_Information:

Series_Name: data release
Issue_Identification: DOI:10.5066/P91QSGXF

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/P91QSGXF

Description:

Abstract:

This dataset contains California shoreline change rates derived from mean high water (MHW) shorelines from 1998 (in Central and Southern California) and 2002 (in Northern California) to 2016. The MHW elevation in each analysis region (Northern, Central, and Southern California) maintained consistency with that of the National Assessment of Shoreline Change. The operational MHW line was extracted from Light Detection and Ranging (LiDAR) digital elevation models (DEMs) using the ArcGIS smoothed contour method. Within the Digital Shoreline Analysis System (DSAS), end-point rates (EPR) of shoreline change were calculated between the 1998/2002 and the 2016 shorelines at a transect spacing of 50 meters to provide a long-term perspective of sandy shoreline behavior along the coast of California.

Purpose:

This work is one portion of ongoing coastal monitoring efforts for California and the western United States. These data provide an estimate of past shoreline positions and shoreline change throughout California, with the goal of understanding how shorelines change over time and in response to El Nino events. The data are intended for policy makers, resource managers, science researchers, students, and the general public. These data can be used with geographic information systems or other software to identify and assess possible areas of vulnerability. These data are not intended to be used for navigation.

Supplemental_Information:

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: 19980418
Ending_Date: 20160501

Currentness_Reference: Dates of datasets used in the analysis

Status:

Progress: Complete
Maintenance_and_Update_Frequency: None planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -114.14
East_Bounding_Coordinate: -124.42
North_Bounding_Coordinate: 42.00
South_Bounding_Coordinate: 32.53

Keywords:

Theme:

Theme_Keyword_Thesaurus: Data Categories for Marine Planning
Theme_Keyword: Physical Habitats and Geomorphology

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: Climate Change
Theme_Keyword: Storms
Theme_Keyword: Sea-level Change
Theme_Keyword: El Nino-Southern Oscillation

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: Oceans
Theme_Keyword: ClimatologyMeteorologyAtmosphere

Theme:

Theme_Keyword_Thesaurus: Marine Realms Information Bank (MRIB) keywords
Theme_Keyword: sea level change
Theme_Keyword: waves
Theme_Keyword: coastal erosion
Theme_Keyword: El Nino events

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:

Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5f9317b882ce720ee2d5970a

Place:

Place_Keyword_Thesaurus: Geographic Names Information System
Place_Keyword: State of California

Place:

Place_Keyword_Thesaurus: None
Place_Keyword: Northern California
Place_Keyword: Central California
Place_Keyword: Southern California
Place_Keyword: NorCal
Place_Keyword: CenCal
Place_Keyword: SoCal

Access_Constraints: none
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: California
Postal_Code: 95060-5792
Country: USA

Contact_Voice_Telephone: 831-427-4747
Contact_Electronic_Mail_Address: pcmsc_data@usgs.gov

Cross_Reference:

Citation_Information:

Originator: Schuyler A. Smith
Originator: Patrick L. Barnard
Publication_Date: 2020
Title:

The impacts of the 2015/2016 El Nino on California’s sandy beaches

Other_Citation_Details:

Smith, S.A., and Barnard, P.L., 2020, The impacts of the 2015/2016 El Nino on California’s sandy beaches: Geomorphology

Online_Linkage: https://doi.org/10.1016/j.geomorph.2020.107583

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Estimates of shoreline position accuracy using mean high water lines derived from LiDAR DEMS have been cross checked with satellite-derived shorelines, shorelines derived by the national assessment of shoreline change, and in-situ data collected by GPS surveys. However, lack of alternate data collection methods during this time limits the amount of validation possible for this dataset.

Logical_Consistency_Report:

Data have undergone QA/QC and fall within expected/reasonable ranges. The MHW elevation in each analysis region (Northern, Central, and Southern California) maintained consistency with that of the National Assessment of Shoreline Change.

Completeness_Report:

These geospatial projections are complete. Any gaps in these data, if applicable, are a consequence of nonexisting data or existing data that did not meet quality assurance standards. Users are advised to read the rest of the metadata record and references carefully for additional details.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

A formal accuracy assessment of the lidar-derived shorelines was conducted for each region. Within the Digital Shoreline Analysis System (DSAS) the uncertainty values for both shoreline positions used in the end-point rate (EPR) calculation were squared, then added together (summation of squares). The square root of the summation of squares was divided by the number of years between the two shorelines to determine the uncertainty of the end-point rate.

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Although no formal vertical position accuracy assessment was conducted, the uncertainty associated with each LiDAR-derived shoreline is comprised of the vertical (and horizontal) uncertainty of the source DEM. It is assumed that uncertainty associated with the extraction of the MHW line from a DEM is negligible.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: National Oceanic and Atmospheric Administration (NOAA)
Publication_Date: 2016
Title: NOAA LiDAR surveys of the Central California region 1998-2016
Publication_Information:

Publication_Place: online
Publisher: NOAA Digital Coast

Online_Linkage: https://coast.noaa.gov/dataviewer

Type_of_Source_Media: online
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 19980101
Ending_Date: 20160528

Source_Currentness_Reference: data collection dates

Source_Citation_Abbreviation: NOAA LiDAR
Source_Contribution:

MHW shoreline positions were digitized from multiple LiDAR data sets within the full geographic extent of the study area from 1998 - 2016.

Source_Information:

Source_Citation:

Citation_Information:

Originator:

Data from Southern California Coastal Response to 2015-2016 El Nino

Publication_Date: 2018
Title:

Data from Southern California Coastal Response to the 2015-2016 El Nino

Publication_Information:

Publication_Place: online
Publisher: University of California San Diego Library Digital Collection

Online_Linkage: https://library.ucsd.edu/dc/collection/bb80931629

Type_of_Source_Media: online
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20151006
Ending_Date: 20160322

Source_Currentness_Reference: data collection dates

Source_Citation_Abbreviation: SoCal LiDAR
Source_Contribution:

Using ArcGIS, MHW shorelines were extracted from these airborne LiDAR datasets collected on 6-October-2015 and 22-March-2016.

Process_Step:

Process_Description:

High-accuracy LiDAR data were downloaded from NOAA Digital Coast in the form of digital elevation models (DEMs) for both pre-El Nino (2015) and post-El Nino (2016), as well as 1998/2002 for perspective. Due to sparse LiDAR data coverage in southern California, SoCal LiDAR from UC San Diego Library Collections was used in this region.

Source_Used_Citation_Abbreviation: NOAA LiDAR
Source_Used_Citation_Abbreviation: SoCal LiDAR
Process_Date: 20170701

Process_Step:

Process_Description:

The operational MHW line was extracted using the ArcGIS smoothed contour method with the smoothing tolerance parameter set to 30 m alongshore. The NAVD88 datum was used for the MHW elevation. The mean high water (MHW) shoreline elevation in each analysis region (Northern, Central, and Southern California) maintained consistency with that of the National Assessment of Shoreline Change.

Process_Date: 20170815

Process_Step:

Process_Description:

The smoothed contour line was then quality controlled to remove artifacts, as well as remove any contour tool interpretation of human-made infrastructure (such as jetties, piers, and sea walls), using satellite imagery available in ArcGIS.

Process_Date: 20180401

Process_Step:

Process_Description:

Using the uncertainty values reported in the DEM metadata, the DEM vertical uncertainty was converted to horizontal uncertainty using the slope of the beach at 50-meter points along the MHW line, using the following steps: Slope maps were created from the DEMS within ArcMap using the 3D Analyst Raster Surface Slope tool. Next, the MHW lines were converted to 50-meter-spaced points, at which the slope value of the DEM was extracted. The average of these values for North, Central, and Southern California was used to convert the vertical uncertainty of the DEM to a horizontal uncertainty. Finally, the horizontal uncertainty and converted vertical uncertainty were summed in quadrature to calculate a final uncertainty value associated with each shoreline.

Process_Date: 20180615

Process_Step:

Process_Description:

Using the Digital Shoreline Analysis System (DSAS), the 2016 MHW shoreline was buffered to create an offshore baseline. From this baseline, shore-normal transects were cast at 50-meter intervals. Current and historical satellite imagery from Google Earth and ArcGIS were used to manually remove transects that intersected rocky headlands, cliffs, or human-made structures without fronting beaches. Additionally, transects that intersected primarily rocky beaches (cobble-boulder sediment size) were deleted due to lack of confidence in the ability of the MHW line to reflect shoreline change in these areas. Within DSAS, end-point rates (EPR) of change were calculated between the 1998/2002 and the 2016 shorelines at 50-m spacing to provide a long-term perspective of shoreline behavior.

Process_Date: 20180801

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

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: 0.999600
Longitude_of_Central_Meridian: -123.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 500000.000000
False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:

Abscissa_Resolution: 2.000000
Ordinate_Resolution: 2.000000

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257222

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label:

California shoreline change rates for the years 1998/2002 to 2016

Entity_Type_Definition:

Shapefile of shoreline change rates displayed as points along the 2016 shoreline.

Entity_Type_Definition_Source:

originators at United States Geological Survey, Pacific Coastal and Marine Science Center

Attribute:

Attribute_Label: Region
Attribute_Definition:

Region of California where contributing shorelines were used to determine change rates

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: n
Enumerated_Domain_Value_Definition: NorCal, Northern California
Enumerated_Domain_Value_Definition_Source: producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: c
Enumerated_Domain_Value_Definition: CenCal, Central California
Enumerated_Domain_Value_Definition_Source: producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: s
Enumerated_Domain_Value_Definition: SoCal, Southern California
Enumerated_Domain_Value_Definition_Source: producer defined

Attribute:

Attribute_Label: AlongShrID
Attribute_Definition:

Unique number associated with each point in this dataset, with 0 being the northernmost point and increasing southward.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0
Range_Domain_Maximum: 12567
Attribute_Units_of_Measure: NA
Attribute_Measurement_Resolution: 1

Attribute:

Attribute_Label: EPR
Attribute_Definition:

Long-term end-point rate shoreline change along specified transects, ending with 2016 shoreline. The rate is reported in meters per year with positive values indicating accretion and negative values indicating erosion.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -8.26
Range_Domain_Maximum: 9.64
Attribute_Units_of_Measure: meters per year

Attribute:

Attribute_Label: RateUncert
Attribute_Definition: Uncertainty associated with rate of defined shoreline change
Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0.11
Range_Domain_Maximum: 0.16
Attribute_Units_of_Measure: meters per year

Attribute:

Attribute_Label: MHW_Elev
Attribute_Definition: MHW elevation (NAVD88) used to define contributing shorelines
Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1.33
Range_Domain_Maximum: 1.81
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: Year
Attribute_Definition: Effective date of end-point MHW shoreline positions
Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 2016
Range_Domain_Maximum: 2016
Attribute_Units_of_Measure: year

Attribute:

Attribute_Label: UTM_X
Attribute_Definition:

Position of shoreline change end-point in 2016, x-coordinate in UTM (zone 10).

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 402538
Range_Domain_Maximum: 1051134
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: UTM_Y
Attribute_Definition:

Position of shoreline change end-point in 2016, y-coordinate in UTM (zone 10).

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 3619235
Range_Domain_Maximum: 4573966
Attribute_Units_of_Measure: meters

Attribute:

Attribute_Label: Long
Attribute_Definition:

Position of shoreline change end-point in 2016, coordinate in degrees longitude.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -124.16
Range_Domain_Maximum: -117.13
Attribute_Units_of_Measure: Decimal degrees

Attribute:

Attribute_Label: Lat
Attribute_Definition:

Position of shoreline change end-point in 2016, coordinate in degrees latitude.

Attribute_Definition_Source: producer defined
Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 32.57
Range_Domain_Maximum: 41.31
Attribute_Units_of_Measure: Decimal degrees

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey - ScienceBase

Contact_Address:

Address_Type: mailing and physical
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Country: USA

Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov

Resource_Description:

These data are available in shapefile format. Shoreline change rates are for the entire state of California. CSDGM FGDC-compliant metadata is zipped with the dataset.

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. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: shapefile
Format_Version_Number: ArcGIS 10.6
Format_Specification:

Features are in shapefile format and are projected in NAD 1983 UTM zone 10 coordinates with a geographic coordinate system of GCS North American 1983.

Format_Information_Content:

The .zip file includes a shapefile of shoreline change rates and the XML (.xml) version of the metadata

File_Decompression_Technique: WinZip
Transfer_Size: 0.06

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://www.sciencebase.gov/catalog/file/get/5f9317b882ce720ee2d5970a

Network_Resource_Name: https://doi.org/10.5066/P91QSGXF

Access_Instructions:

Data can be downloaded using the Network_Resource_Name links. The first link is a direct link to download the zipped file of 1998-2016 shoreline change rate data and metadata. The second link points to the landing page for the entire data release.

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20201231
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: California
Postal_Code: 95060-5792
Country: USA

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/ScienceBase/DR_P91QSGXF/CA_1998_2016_shoreline_change_rates_metadata.html>