Long-Term Shoreline Change Rates for Northern California Generated at a 50 m Transect Spacing, 1854-2002

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: Cheryl Hapke

Originator: David Reid

Publication_Date: Unknown

Title:

Long-Term Shoreline Change Rates for Northern California Generated at a 50 m Transect Spacing, 1854-2002

Geospatial_Data_Presentation_Form: vector digital data

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2006-1251

Publication_Information:

Publication_Place:

U.S. Geological Survey, Pacific Science Center, Santa Cruz, California

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: <http://pubs.usgs.gov/of/2006/1251>

Larger_Work_Citation:

Citation_Information:

Originator: Cheryl Hapke

Originator: David Reid

Originator: Bruce Richmond

Originator: Peter Ruggiero

Originator: Jeff List

Publication_Date: Unknown

Title:

National Assessment of Shoreline Change: Part 3, Historical Shoreline Changes and Associated Coastal Land Loss Along the Sandy Shoreline of California

Series_Information:

Series_Name: Open-File Report

Issue_Identification: 2006-1219

Publication_Information:

Publication_Place: U.S. Geological Survey, Pacific Science Center

Publisher: U.S. Geological Survey, Coastal and Marine Geology Program

Online_Linkage: <http://pubs.usgs.gov/of/2006/1219>

Description:

Abstract:

Rates of long-term and short-term shoreline change were generated in a GIS using the Digital Shoreline Analysis System (DSAS) version 3.0; An ArcGIS extension for calculating shoreline change: U.S. Geological Survey Open-File Report 2005-1304, Thieler, E.R., Himmelstoss, E.A., Zichichi, J.L., and Miller, T.M. The extension is designed to efficiently lead a user through the major steps of shoreline change analysis. This extension to ArcGIS contains three main components that define a baseline, generate orthogonal transects at a user-defined separation along the coast, and calculate rates of change (linear regression, endpoint rate, average of rates, average of endpoints, jackknife).

Purpose:

Historical shoreline change is considered to be a crucial element in studying the vulnerability of the national shoreline. These data are used in a shoreline change analysis for the USGS National Assessment Project.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2005

Currentness_Reference: publication date

Status:

Progress: Complete

Maintenance_and_Update_Frequency: Unknown

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -124.358738

East_Bounding_Coordinate: -122.960686

North_Bounding_Coordinate: 41.997872

South_Bounding_Coordinate: 38.224796

Keywords:

Theme:

Theme_Keyword_Thesaurus: General

Theme_Keyword: Shoreline

Theme_Keyword: Historic Shoreline

Theme_Keyword: Shoreline Change Rate

Theme_Keyword: Linear Regression Rate

Theme_Keyword: Endpoint Rate

Theme_Keyword: Baseline

Theme_Keyword: Beach Erosion

Theme_Keyword: Beach Nourishment

Theme_Keyword: LIDAR

Theme_Keyword: T-sheet

Theme_Keyword: Tp-sheet

Theme_Keyword: Coastal Survey Map

Place:

Place_Keyword_Thesaurus: General

Place_Keyword: United States

Place_Keyword: California

Access_Constraints: None

Use_Constraints:

Public domain data from the U.S. government are freely redistributable with proper metadata and source attribution. Please recognize the U.S. Geological Survey (USGS) as the source of this information.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Pacific Science Center

Contact_Address:

Address_Type: mailing and physical address

Address: 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: Ca

Postal_Code: 95060

Country: USA

Contact_Voice_Telephone: (831)-427-4450

Contact_Facsimile_Telephone: (831)-427-4748

Hours_of_Service: Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time

Native_Data_Set_Environment:

Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535

Data_Quality_Information:

Logical_Consistency_Report:

Transect generation was made as part of the calculation process for the Digital Shoreline Analysis System an Extension for ArcGIS (<http://pubs.usgs.gov/of/2005/1304/>)

Completeness_Report:

This shoreline-transect data adequately represented the intersect at the time of the analysis. Remaining gaps in this data, if applicable, are a consequence of non-existing data, transects crossing man-made features or existing data that did not meet quality assurance standards.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report: See USGS Open File Report 2006-1219

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Cheryl Hapke

Originator: David Reid

Publication_Date: Unknown

Title:

THE NATIONAL ASSESSMENT OF SHORELINE CHANGE: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the Sandy Shorelines of the California Coast.

Series_Information:

Series_Name: Open File Report

Issue_Identification: 2006-1251

Publication_Information:

Publication_Place: USGS Pacific Science Center, Santa Cruz, California

Publisher: USGS Coastal and Marine Geology Program

Online_Linkage: <http://pubs.usgs.gov/of/2006/1251>

Larger_Work_Citation:

Citation_Information:

Originator: Cheryl Hapke

Originator: David Reid

Originator: Bruce Richmond

Originator: Peter Ruggiero

Originator: Jeff List

Publication_Date: Unknown

Title:

National Assessment of Shoreline Change: Part 3, Historical Shoreline Changes and Associated Coastal Land Loss Along sandy shorelines of the California coast

Series_Information:

Series_Name: Open File Report

Issue_Identification: 2006-1219

Publication_Information:

Publication_Place: USGS Pacific Science Center, Santa Cruz, California

Publisher: USGS Coastal and Marine Geology Program

Online_Linkage: <http://pubs.usgs.gov/of/2006/1219>

Type_of_Source_Media: Transects

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: unknown

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation:

Long-Term Shoreline Change Rate Transects for Northern California

Source_Contribution: USGS

Process_Step:

Process_Description:

A baseline was manually constructed seaward of, and parallel to, the trend of shorelines representing four general time periods (1800s, 1920s-1930s, 1970s, and 1998-2002). Using DSAS, transects were generated with a spacing of 50m and transect-shoreline intersection points were saved to a separate layer. Transects were manually eliminated to prevent calculation of rates in areas where less than four shorelines were intersected.
Long-term rates of shoreline change, in units of m/yr, were calculated at each transect using linear regression applied to all four shoreline positions from the earliest (1800s) to the most recent (derived from lidar). Linear regression was selected because it has been shown to be the most statistically robust quantitative method when a limited number of shorelines are available and it is the most commonly applied statistical technique for expressing shoreline movement and estimating rates of change. Uncertainties for the long-term rates are also reported in units of m/yr and represent a 90% confidence interval for the slope of the regression line. This means with 90% statistical confidence that the true rate of shoreline change falls within the range defined by the reported value plus or minus the error value. The variability around the trend reflects both measurement and sampling errors. Short-term rates of shoreline change, in units of m/yr, were calculated using the endpoint method comparing the 1970s and most recent shoreline positions.

Process_Date: Unknown

Process_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Pacific Science Center

Contact_Person: Bruce Richmond

Contact_Address:

Address_Type: mailing and physical address

Address: 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: Ca

Postal_Code: 95060

Country: USA

Contact_Voice_Telephone: (831)-427-4450

Contact_Facsimile_Telephone: (831)-427-4748

Hours_of_Service: Monday through Friday, 8 a.m. to 5 p.m., Pacific Standard Time

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: 3006

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: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.001024

Ordinate_Resolution: 0.001024

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1927

Ellipsoid_Name: Clarke 1866

Semi-major_Axis: 6378206.400000

Denominator_of_Flattening_Ratio: 294.978698

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Norcal_transects_lt

Entity_Type_Definition: Southern California Long-Term Transects

Entity_Type_Definition_Source: USGS

Attribute:

Attribute_Label: FID

Attribute_Definition: Internal feature number.

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:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: OBJECTID

Attribute_Definition: Feature number.

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 5734

Attribute:

Attribute_Label: TransOrder

Attribute_Definition: Transect Sequence

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 1

Range_Domain_Maximum: 5734

Attribute:

Attribute_Label: BaselineID

Attribute_Definition: Baseline Identification

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Unrepresentable_Domain: Baseline Identification

Attribute:

Attribute_Label: Autogen

Attribute_Definition:

Indicates whether the transect was autogenerated or manually generated.

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Unrepresentable_Domain:

Indicates whether the transect was autogenerated or manually generated.

Attribute:

Attribute_Label: StartX

Attribute_Definition: X starting position of the transect in UTM meters.

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Unrepresentable_Domain: X starting position of the transect in UTM meters.

Attribute:

Attribute_Label: StartY

Attribute_Definition: Y starting position of the transect in UTM meters.

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Unrepresentable_Domain: Y starting position of the transect in UTM meters.

Attribute:

Attribute_Label: ProcTime

Attribute_Definition: Date and time the rate calculation was generated.

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Unrepresentable_Domain: Date and time the rate calculation was generated.

Attribute:

Attribute_Label: ShorelineD

Attribute_Definition: Shorelines used in calculation

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Unrepresentable_Domain: Shorelines used in calculation

Attribute:

Attribute_Label: EndX

Attribute_Definition: X Ending position of the transect in UTM meters.

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Unrepresentable_Domain: X Ending position of the transect in UTM meters.

Attribute:

Attribute_Label: PointCNT

Attribute_Definition: Number of shoreline intersections in the rate calculation.

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Unrepresentable_Domain: Number of shoreline intersections in the rate calculation.

Attribute:

Attribute_Label: LRR

Attribute_Definition: Linear regression rate.

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: -2.36

Range_Domain_Maximum: 3.25

Attribute_Units_of_Measure: Meters/Year

Attribute_Measurement_Resolution: 0.1

Attribute:

Attribute_Label: LR2

Attribute_Definition: Correlation coefficient (r^2).

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 1

Attribute_Units_of_Measure: Meters

Attribute_Measurement_Resolution: 0.1

Attribute:

Attribute_Label: EndY

Attribute_Definition: Y Ending position of the transect in UTM meters.

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Unrepresentable_Domain: Y Ending position of the transect in UTM meters.

Attribute:

Attribute_Label: Azimuth

Attribute_Definition: The transect's horizontal angular distance from north.

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Unrepresentable_Domain: The transect's horizontal angular distance from north.

Attribute:

Attribute_Label: LCI90

Attribute_Definition: Linear Regression Confidence Interval 90%

Attribute_Definition_Source: DSAS

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 7.06

Attribute_Units_of_Measure: Meters

Attribute_Measurement_Resolution: 0.1

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: U.S. Geological Survey, Pacific Science Center

Contact_Address:

Address_Type: mailing and physical address

Address: 400 Natural Bridges Drive

City: Santa Cruz

State_or_Province: Ca

Postal_Code: 95060

Country: USA

Contact_Voice_Telephone: (831)-427-4450

Contact_Facsimile_Telephone: (831)-427-4748

Hours_of_Service: Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time

Resource_Description: USGS Open-File Report 2006-1219

Distribution_Liability:

Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, these data and information are provided with the understanding that they are not guaranteed to be usable, timely, accurate, or complete. Users are cautioned to consider carefully the provisional nature of these data and information before using them for decisions that concern personal or public safety or the conduct of business that involves substantial monetary or operational consequences. Conclusions drawn from, or actions undertaken on the basis of, such data and information are the sole responsibility of the user.
Neither the U.S. Government nor any agency thereof, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any data, software, information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights.
Trade, firm, or product names and other references to non-USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: ESRI Shapefile

Format_Version_Date: 20060901

Format_Specification:

Seven files comprise the ArcView shapefile: <filename>.dbf, <filename>.shp, <filename>.shx, <filename>.prj, <filename>.avl, <filename>.sbx, <filename>.sbn

Transfer_Size: 2.652

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: USGS Pacific Science Center

Fees: None

Metadata_Reference_Information:

Metadata_Date: 20060826

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization:

U.S. Geological Survey, Center for Coastal and Watershed Studies

Contact_Person: Tara Miller

Contact_Address:

Address_Type: mailing and physical address

Address: 600 4th Street South

City: St. Petersburg

State_or_Province: FL

Postal_Code: 33701

Country: USA

Contact_Voice_Telephone: (727) 803-8747

Contact_Facsimile_Telephone: (727) 803-2032

Contact_Electronic_Mail_Address: taram@usgs.gov

Hours_of_Service: Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile