Cheryl Hapke
David Reid
2007
cencal_baseline.shp - Offshore Baseline for Central California Generated to Calculate Cliff Erosion Rates
vector digital data
Open-File Report
2007-1112
U.S. Geological Survey, Pacific Science Center, Santa Cruz, California
U.S. Geological Survey, Coastal and Marine Geology Program
https://pubs.usgs.gov/of/2007/1112/CCal.zip
https://pubs.usgs.gov/of/2007/1112/
Cheryl Hapke
David Reid
Krystal Green
Mark Borrelli
2007
National Assessment of Shoreline Change: Part 4: A GIS Compilation of Vector cliff edges and associated change data for the cliffed shorelines of the California Coast
Open-File Report
2007-1112
U.S. Geological Survey, Pacific Science Center, Santa Cruz
U.S. Geological Survey, Coastal and Marine Geology Program
https://pubs.usgs.gov/of/2007/1112/
cencal_baseline_shp
Rates of cliff edge erosion were generated in a GIS using the Digital Shoreline Analysis System (DSAS) version 3.2; 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).
Historical cliff erosion is considered to be a crucial element in studying the vulnerability of the national coastline. These data are used in a cliff erosion analysis for the USGS National Assessment Project.
en
2005
publication date
None planned
-123.023918
-119.812615
38.242744
34.432397
-123.023838-119.96230034.43770738.240886
General
Cliff Edge
Historic Cliff Edge
Cliff Erosion Rate
Endpoint Rate
Baseline
Cliff Erosion
LIDAR
T-sheet
Tp-sheet
Coastal Survey Map
U.S. Geological Survey
USGS
Coastal and Marine Geology Program
CMGP
ESRI polyline shapefile
ISO 19115 Topic Category
oceans
geoscientificInformation
oceans and estuaries
oceans and coastal
Geographic Names Information System, USGS, Reston, VA
United States
California
None
Public domain data are freely redistributable with proper metadata and source attribution. The U.S. Geological Survey (USGS) must be referenced as the originator of the dataset in any future products or research derived from these data.
Cheryl Hapke
U.S. Geological Survey
Geologist
mailing and physical address
USGS Patuxent Wildlife Research Center
University of Rhode Island
317 Woodward Hall, Dept. of Geosciences
Kingston
RI
02881
USA
401-874-5532
401-874-2190
chapke@usgs.gov
Monday through Friday, 9 a.m. to 5 p.m., Eastern Standard Time
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722
Cheryl Hapke
David Reid
2007
The National Assessment of Shoreline Change, Part 4: Historical Coastal Cliff Retreat Along the California Coast
1.0
Open-File Report
2007-1133
U.S. Geological Survey, Pacific Science Center, Santa Cruz
U.S. Geological Survey, Coastal and Marine Geology Program
https://pubs.usgs.gov/of/2007/1133/
Shapefile
The attributes in this dataset are based on the Digital Shoreline Analysis System (DSAS) version 3.2; An ArcGIS extension for calculating shoreline change (Thieler, E.R., Himmelstoss, E.A., Zichichi, J.L., and Miller, T.M. 2005. U.S. Geological Survey Open-File Report 2005-1304). The data has gone through a series of QA/QC procedures, and is therefore believed to accurately reflect the data gathered as part of the National Assessment of Shoreline Change Study.
Baseline generation was made as part of the calculation process for the Digital Shoreline Analysis System an Extension for ArcGIS (https://pubs.usgs.gov/of/2005/1304/). No additional checks for topological consistency were performed on the data.
This baseine data represents a generalization of the coastline of California used by DSAS. Remaining gaps in this data, if applicable, are a consequence of non-existing cliff edges data.
A Baseline was generated within ArcGIS to be used by the Digital Shoreline Anaylsis System (https://pubs.usgs.gov/of/2005/1304/) in the calculation of cliff erosion rates. Please visit our full report on cliff erosion along the Coastline of California (https://pubs.usgs.gov/of/2007/1133/) for more information about this analysis.
A baseline was manually constructed seaward of, and parallel to, the trend of cliff edges representing two general time periods (1920s-1930s and 1998-2002). Using DSAS (USGS OFR 2005-1304), transects were generated with a spacing of 20m and transect-cliff edge intersection points were saved to a separate layer. Transects were manually eliminated to prevent calculation of rates in areas where less than two cliff edges were intersected.
Rates of cliff edge erosion, in units of m/yr, were calculated at each transect using end point rate applied to both cliff edge positions from 1920s-1930s and 1998-2002 (derived from lidar). End point rate was selected because there were two cliff edges available. Uncertainties are reported in units of m/yr.
2006
Cheryl Hapke
U.S. Geological Survey
mailing and physical address
USGS Patuxent Wildlife Research Center
University of Rhode Island
Coastal Field Station
317 Woodward Hall, Dept. of Geosciences
Kingston
RI
02881
USA
401-874-5532
401-874-2190
chapke@usgs.gov
Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time
Data were projected from UTM zone 10 to geographic
Tool: ArcGIS > ArcToolbox > Toolboxes > Data Management Tools > Project
Command issued:
['GCS_North_American_1983',DATUM['D_North_American_1983',SHPERIOD['GRS_1980',6378137.0,298.25722101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]]
20070605
Emily Himmelstoss
U.S. Geological Survey
Geologist
mailing and physical address
384 Woods Hole Road
Woods Hole
MA
02543-1598
USA
508-548-8700 x2262
508-457-2310
ehimmelstoss@usgs.gov
Vector
String
1
SimplePolylineFALSE1TRUETRUE
0.000001
0.000001
Decimal degrees
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
GCS_North_American_1983
CenCal_Baseline
Baseline for Central California
U.S. Geological Survey
Feature Class1
FID
Internal feature number
ESRI
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
ESRI
Coordinates defining the feature.
SHAPE_LengSHAPE_LengFloat1911RIDRIDNumber4Shape_Le_1Shape_Le_1Float1911
U.S. Geological Survey
mailing and physical address
Pacific Science Center
400 Natural Bridges Drive
Santa Cruz
CA
95060
USA
831-427-4450
831-427-4748
downloadable data
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.
SHP
Unspecified
ESRI Polyline Shapefile. The DBF file contains the attribute data in dBASE format. The PRJ file contains the coordinate system information. The SBN and SBX files contain the spatial index of the geospatial data. The SHP file contains the geospatial data. The SHX file contains the index of the geospatial data. The XML file contains the metadata describing the data set.
zip archive
0.348
0.060
https://pubs.usgs.gov/of/2007/1112/CCal.zip
https://pubs.usgs.gov/of/2007/1112/
Data are downloadable via the World Wide Web (WWW).
None
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.
20070319
Cheryl Hapke
U.S. Geological Survey
mailing and physical address
USGS Patuxent Wildlife Research Center
University of Rhode Island
Coastal Field Station
317 Woodward Hall, Dept. of Geosciences
Kingston
RI
02881
USA
401-874-5532
401-874-2190
chapke@usgs.gov
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
enhttp://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350cencal_baseline_shp-123.023838-119.962338.24088634.4377071-123.023838-119.962338.24088634.4377071ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002file://\\EMIHIMDTXP2\I$\CA_cliffs\Original_data\Central_California\fixed\geographic\cencal_baseline_shp.shpLocal Area Network0.060ShapefileGCS_North_American_198312007060515050900200809161401060020080916