SOCAL_TRANSECTS_LT - Long-Term Shoreline Change Rates for Southern California Generated at a 50m Transect Spacing, 1852-1998

Metadata:


Identification_Information:
Citation:
Citation_Information:
Originator: Cheryl Hapke
Originator: David Reid
Publication_Date: 2006
Title:
SOCAL_TRANSECTS_LT - Long-Term Shoreline Change Rates for Southern California Generated at a 50m Transect Spacing, 1852-1998
Edition: 1.0
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1251
Publication_Information:
Publication_Place: Pacific Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: http://pubs.usgs.gov/of/2006/1251/SCal.zip
Larger_Work_Citation:
Citation_Information:
Originator: Cheryl Hapke
Originator: David Reid
Publication_Date: 2006
Title:
National Assessment of Shoreline Change: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the Sandy Shorelines of the California Coast
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1251
Publication_Information:
Publication_Place: Pacific Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: http://pubs.usgs.gov/of/2006/1251/
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 U.S. Geological Survey (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: -120.001754
East_Bounding_Coordinate: -117.125124
North_Bounding_Coordinate: 34.459600
South_Bounding_Coordinate: 32.576084
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
Theme_Keyword: U.S. Geological Survey
Theme_Keyword: USGS
Theme_Keyword: Coastal and Marine Geology Program
Theme_Keyword: CMGP
Theme_Keyword: ESRI polyline shapefile
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: oceans
Theme_Keyword: oceans and estuaries
Theme_Keyword: oceans and coastal
Theme_Keyword: environment
Theme_Keyword: geoscientificInformation
Place:
Place_Keyword_Thesaurus: General
Place_Keyword: California
Place_Keyword: United States
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 9.1.0.780
Cross_Reference:
Citation_Information:
Originator: Cheryl J. Hapke
Originator: David Reid
Originator: Bruce M. Richmond
Originator: Peter Ruggiero
Originator: Jeff List
Publication_Date: 2006
Title:
National Assessment of Shoreline Change Part 3: Historical Shoreline Change and Associated Coastal Land Loss Along Sandy Shorelines of the California Coast
Edition: 1.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1219
Publication_Information:
Publication_Place: Pacific Science Center, Santa Cruz, CA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: http://pubs.usgs.gov/of/2006/1219/
Cross_Reference:
Citation_Information:
Originator: E. Robert Thieler
Originator: Emily A. Himmelstoss
Originator: Jessica L. Zichichi
Originator: Tara L. Miller
Publication_Date: 2005
Title:
The Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS Extension for Calculating Historic Shoreline Change
Edition: 3.0
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2005-1304
Publication_Information:
Publication_Place: Woods Hole Science Center, Woods Hole, MA
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: http://woodshole.er.usgs.gov/project-pages/DSAS/version3/
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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:
Series_Information:
Publication_Information:
Larger_Work_Citation:
Citation_Information:
Series_Information:
Publication_Information:
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: unknown
Source_Currentness_Reference:
ground condition
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_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Bruce Richmond
Contact_Address:
Address_Type: mailing and physical address
Address:
Pacific Science Center
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
Process_Step:
Process_Description:
Data were projected from UTM zone 10 to geographic with a datum shift from NAD27 to NAD83

Tool: ArcGIS > ArcToolbox > Toolboxes > Data Management Tools > Project

Command issued:
GEOGCS['GCS_North_American_1983',DATUM['D_North_American_1983',SPHEROID['GRS_1980',6378137.0,298.257222101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]] # NAD_1927_To_NAD_1983_NADCON
Process_Date: 20070716
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Emily Himmelstoss
Contact_Organization: U.S. Geological Survey
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing and physical address
Address:
384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2262
Contact_Facsimile_Telephone: (508) 457-2310
Contact_Electronic_Mail_Address: ehimmelstoss@usgs.gov
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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: 5696
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Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.000000
Longitude_Resolution: 0.000000
Geographic_Coordinate_Units: Decimal degrees
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
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Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Socal_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
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Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address:
Pacific Science Center
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: Downloadable Data: USGS Open-File Report 2006-1251
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: SHP
Format_Version_Date: 20060901
Format_Specification:
ESRI polyline shapefile
Format_Information_Content:
Seven files comprise the ArcView shapefile: <filename>.dbf, <filename>.shp, <filename>.shx, <filename>.prj, <filename>.avl, <filename>.sbx, <filename>.sbn
File_Decompression_Technique: zip archive
Transfer_Size: 2.652
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: http://pubs.usgs.gov/of/2006/1251/SCal.zip
Network_Resource_Name: http://pubs.usgs.gov/of/2006/1251/#gis
Access_Instructions:
Data may be downloaded via the World Wide Web (WWW).
Fees: None
Technical_Prerequisites:
These data are available in Environmental Systems Research Institute (ESRI) shapefile format. The user must have ArcGIS or ArcView 3.0 or greater software to read and process the data file. In lieu of ArcView or ArcGIS, the user may utilize another GIS application package capable of importing the data. A free data viewer, ArcExplorer, capable of displaying the data is available from ESRI at www.esri.com.
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Metadata_Reference_Information:
Metadata_Date: 20070716
Metadata_Review_Date: 20070301
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Address:
Address_Type: mailing and physical address
Address:
Pacific Science Center
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
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Access_Constraints: None
Metadata_Use_Constraints:
None
Metadata_Extensions:
Online_Linkage: http://www.esri.com/metadata/esriprof80.html
Profile_Name: ESRI Metadata Profile
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