Cheryl Hapke
David Reid
2006
NORCAL_BASELINES - Offshore Baseline for Northern California Generated to Calculate Shoreline Change Rates
1.0
vector digital data
Open-File Report
2006-1251
Pacific Science Center, Santa Cruz, CA
U.S. Geological Survey, Coastal and Marine Geology Program
http://pubs.usgs.gov/of/2006/1251/NCal.zip
Cheryl Hapke
David Reid
2006
National Assessment of Shoreline Change: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the Sandy Shorelines of the California Coast
1.0
Open-File Report
2006-1251
Pacific Science Center, Santa Cruz, CA
U.S. Geological Survey, Coastal and Marine Geology Program
http://pubs.usgs.gov/of/2006/1251/
Norcal_Baseline
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).
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.
en
2006
publication date
Unknown
-124.409354
-122.968455
41.999479
38.231342
-124.409354
-122.968455
41.999479
38.231342
General
Shoreline
Historic Shoreline
Shoreline Change Rate
Linear Regression Rate
Endpoint Rate
Baseline
Beach Erosion
Beach Nourishment
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
oceans and estuaries
oceans and coastal
environment
geoscientificInformation
United States
California
General
None
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.
Bruce Richmond
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
Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
Cheryl J. Hapke
David Reid
Bruce M. Richmond
Peter Ruggiero
Jeff List
2006
National Assessment of Shoreline Change Part 3: Historical Shoreline Change and Associated Coastal Land Loss Along Sandy Shorelines of the California Coast
1.0
Open-File Report
2006-1219
Pacific Science Center, Santa Cruz, CA
U.S. Geological Survey, Coastal and Marine Geology Program
http://pubs.usgs.gov/of/2006/1219/
E. Robert Thieler
Emily A. Himmelstoss
Jessica L. Zichichi
Tara L. Miller
2005
The Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS Extension for Calculating Historic Shoreline Change
3.0
Open-File Report
2005-1304
Woods Hole Science Center, Woods Hole, MA
U.S. Geological Survey, Coastal and Marine Geology Program
http://woodshole.er.usgs.gov/project-pages/DSAS/version3/
Shapefile
Baseline 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/)
This baseine data represents a generalization of the shoreline of California used by DSAS. Remaining gaps in this data, if applicable, are a consequence of non-existing shoreline data.
A Baseline was generated within ArcGIS to be used by the Digital Shoreline Anaylsis System (http://pubs.usgs.gov/of/2005/1304/)in the calculation of shoreline change rates. Please visit our full report on shoreline change in the Coastline of California (http://pubs.usgs.gov/of/2006/1219/) for more information about this analysis
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 (USGS OFR 2005-1304), 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.
Bruce Richmond
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
Monday through Friday, 8 a.m. to 5 p.m., Pacific Standard Time
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
20070716
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
ArcGIS 9.2 Toolbox
Vector
String
1
Simple
FALSE
FALSE
TRUE
Polyline
1
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
GCS_North_American_1983
Decimal degrees0.0000000.000000
Norcal_Baseline
Baseline for Southern California
USGS
1
Feature Class
FID
Internal feature number.
ESRI
Sequential unique whole numbers that are automatically generated.
0
FID
OID
0
4
Shape
Feature geometry.
ESRI
Coordinates defining the features.
0
Shape
Geometry
0
0
ID
Feature number.
U.S. Geological Survey
1
30
ID
Number
6
SOURCE
Agency that provided feature or data used to create feature.
U.S. Geological Survey
USGS
United States Geological Survey
U.S. Geological Survey
SOURCE
String
20
ACCURACY
Position accuracy of feature.
U.S. Geological Survey
0
The accuracy is not given or is not known.
U.S. Geological Survey
ACCURACY
String
10
TYPE
Type of feature.
U.S. Geological Survey
Baseline
Vector baseline.
U.S. Geological Survey
TYPE
String
64
DESCR
Detailed description of the feature.
U.S. Geological Survey
Describes additional characteristics of feature.
DESCR
String
32
DATE_DATE_Number3
U.S. Geological Survey
mailing and physical address
Pacific Science Center
Santa Cruz
Ca
95060
USA
400 Natural Bridges Drive
(831) 427-4450
(831) 427-4748
Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time
Downloadable Data: USGS Open-File Report 2006-1251
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
20060901
ESRI polyline shapefile
Seven files comprise the ArcView shapefile: <filename>.dbf, <filename>.shp, <filename>.shx, <filename>.prj, <filename>.avl, <filename>.sbx, <filename>.sbn
zip archive
0.038
0.015
http://pubs.usgs.gov/of/2006/1251/NCal.zip
http://pubs.usgs.gov/of/2006/1251/#gis
Data may be downloaded 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.
20070716
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
Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time
None
None
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
en
http://www.esri.com/metadata/esriprof80.htmlESRI Metadata Profile20070301
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.780
-124.409354
41.999479
38.231342
-122.968455
1
Norcal_Baseline
-124.409354
41.999479
38.231342
-122.968455
1
002
Local Area Network
file://\\gisdata\data01\regional\westcoast\shoreline_change\ca_coast\geo\norcal\Norcal_Baseline.shp
0.015
Shapefile
20060822
20070716
14003100
FALSE
20070301
FALSE
19172000
10374400
{8B6B10B6-58E0-4FF9-89AB-7A3C19F1FF1F}
20070716
dataset
ISO 19115 Geographic Information - Metadata
DIS_ESRI1.0
GCS_North_American_1983
1