Cheryl Hapke
David Reid
2007
norcal_transects.shp - Cliff Erosion Rates for Northern California Generated at a 20m Transect Spacing, 1928-1998
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/NCal.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/
norcal_transects
Rates of cliff 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
-124.437518
-122.960856
41.990049
38.245338
-124.404581-122.96294238.25322641.983719
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 Asessment 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.
Cliff edge-transect intersections represent the absolute position of the intersects. No additional checks for topological consistency were performed on the data.
This cliff edge-transect intersect 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.
Postional Accuracy is based on position of cliff edge with respect to the transect.
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 an Extension for ArcGIS (https://pubs.usgs.gov/of/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 erosion, in units of m/yr, were calculated at each transect using end point analysis applied to both cliff edge positions. Uncertainties for the long-term rates are also 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]]
20070215
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
2325
SimplePolylineFALSE2325FALSEFALSE
0.000001
0.000001
Decimal degrees
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
GCS_North_American_1983
Norcal_transects
Cliff Erosion Rate Transects for Northern California
USGS
Feature Class2325
FID
Internal feature number.
ESRI
Meters
Distance from Baseline to Cliff Edge-Transect Intersect
U.S. Geological Survey
Shape
Feature geometry.
ESRI
Coordinates defining the features.
BASELINEID
Baseline ID Used by Transect
U.S. Geological Survey
Baseline Identification
Number9
TRANSORDER
Sequentially numbered values for each transect alongshore
U.S. Geological Survey
1
5734
Number9
PROCTIME
Time stamp for when DSAS computed statistics
U.S. Geological Survey
Date and time the rate calculation was generated.
String30
AUTOGEN
Indicates if transect was automatically generated or manually edited
U.S. Geological Survey
Indicates whether the transect was autogenerated or manually generated.
String1
STARTX
Start x-coordinate for transect position
U.S. Geological Survey
X starting position of the transect in UTM meters.
Number1911
STARTY
Start y-coordinate for transect position
U.S. Geological Survey
Y starting position of the transect in UTM meters.
Number1911
ENDX
End x-coordinate for transect position
U.S. Geological Survey
X Ending position of the transect in UTM meters.
Number1911
ENDY
End y-coordinate for transect position
U.S. Geological Survey
Y Ending position of the transect in UTM meters.
Number1911
AZIMUTH
Angle of transect with respect to north (0/360 equals North) with values increasing clockwise
U.S. Geological Survey
0
360
Number1911
EPR
Endpoint rate in meters/year.
U.S. Geological Survey
Endpoint rate in meters/year.
Number1911
SHAPE_LENG
Length of feature in internal units.
ESRI
Length of feature in internal units.
Number1911
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
5.214
0.195
https://pubs.usgs.gov/of/2007/1112/NCal.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 9.2.2.1350norcal_transects-124.404581-122.96294241.98371938.2532261-124.404581-122.96294241.98371938.2532261ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002file://\\Emihimltxp\sea_disk (e)\CA_cliffs\metadata_1\review\May2007_final\Northern\norcal_transects.shpLocal Area Network0.195ShapefileGCS_North_American_198323252007050116031700200809161404360020080916