Cheryl Hapke David Reid 2005 1.0 vector digital data Open-File Report 2006-1251 U.S. Geological Survey, Center for Coastal and Watershed Studies, St. Petersburg, FL U.S. Geological Survey, Coastal and Marine Geology Program Cheryl Hapke David Reid 2006 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/ Socal_intersects_st http://pubs.usgs.gov/of/2006/1251/SCal.zip 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 2005 publication date Complete Unknown -119.998076 -117.131589 34.456397 32.576268 -119.998076 -117.131589 34.456397 32.576268 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 California United States 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. U.S. Geological Survey, Pacific Science Center mailing and physical address

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 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 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 Shoreline-Transect Intersections represent the absolute position of the intersects and do not take into account bias shift values in the positions and distances of the shoreline and for rate calculation. This shoreline-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 shoreline with respect to the transect. 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 an Extension for ArcGIS(http://pubs.usgs.gov/of/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. U.S. Geological Survey Bruce Richmond 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 unknownground condition Vector Entity point 12719 Simple FALSE FALSE TRUE Point 12719 North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 Decimal degrees0.0000000.000000 Socal_intersects_st Shoreline-Transect Intersections USGS 12719 Feature Class FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. TransectId Identifies transect with which the intersection points are associated. DSAS Value Transect Identification DSAS TransectId Number 9 BaselineId Baseline ID Used by Transect USGS Baseline Identification Number 9 ShorelineI Shoreline Date USGS Date Shoreline Date associated with Transect-Shoreline Intersect USGS String 254 Distance Distance from Baseline to Shoreline-Transect Intersect USGS Meters Distance from Baseline to Shoreline-Transect Intersect USGS 11 Number 19 IntersectX X Coordinate of Intersect Point USGS Coordinates defining the features. 11 Number 19 IntersectY Y Coordinate of Intersect Point USGS Coordinates defining the features. 11 Number 19 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 2004-1089 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 0.340 0.340 http://pubs.usgs.gov/of/2006/1251/SCal.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 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time en NoneNonehttp://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 -119.998076 -117.131589 34.456397 32.576268 1 Socal_intersects_st -119.998076 34.456397 32.576268 -117.131589 1 002 Local Area Network file://\\gisdata\data01\regional\westcoast\shoreline_change\ca_coast\geo\socal\Socal_intersects_st.shp 0.340 Shapefile 20070716 13582000 20070301 FALSE 19234300 20060731 11281500 {43E5A4BF-3E23-49F2-BBAC-95E6E19061AA}FALSE 20070716 dataset ISO 19115 Geographic Information - Metadata DIS_ESRI1.0 GCS_North_American_1983 12719