Cheryl Hapke David Reid 2006 1.1 vector digital data Open-File Report 2006-1251 Pacific Science Center, Santa Cruz, CA U.S. Geological Survey http://pubs.usgs.gov/of/2006/1251/NCal.zip Cheryl Hapke David Reid 2006 1.1 Open-File Report 2006-1251 Pacific Science Center, Santa Cruz, CA U.S. Geological Survey https://doi.org/10.3133/ofr20061251 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. 2006 publication date Complete Unknown -124.409354 -122.968455 41.999479 38.231342 -124.409354 -122.968455 41.999479 38.231342 USGS Metadata Identifier USGS:8369a534-702b-45f0-9dcb-f88710fd30fc None Shoreline Historic Shoreline Shoreline Change Rate Linear Regression Rate Endpoint Rate Baseline Beach Erosion 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 environment geoscientificInformation Marine Realms Information Bank (MRIB) keywords effects of coastal change coastal processes shoreline accretion shoreline erosion USGS Thesaurus Beach Nourishment LIDAR coastal processes erosion shoreline accretion Coastal and Marine Ecological Classification Standard (CMECS) Continental/Island Shore Complex General United States California Coastal and Marine Ecological Classification Standard (CMECS) Northern California Ecoregion Coastal and Marine Ecological Classification Standard (CMECS) Substrate 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 Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060-5792 US 831-427-4747 pcmsc_data@usgs.gov 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 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 http://woodshole.er.usgs.gov/project-pages/DSAS/version3/ 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 position . Process date is estimated. 2002 Bruce Richmond U.S. Geological Survey mailing and physical address

Pacific Science Center

2885 Mission Street

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 Datum shift from NAD27 to NAD83_6 Tool: ArcGIS > ArcToolbox > Toolboxes > Data Management Tools > Project Command issued: ['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_6 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 Keywords section of metadata optimized for discovery in USGS Coastal and Marine Geology Data Catalog. 20170207 U.S. Geological Survey Alan O. Allwardt Contractor -- Information Specialist mailing and physical address

2885 Mission Street

Santa Cruz CA 95060 831-460-7551 831-427-4748 aallwardt@usgs.gov Added keywords from Coastal and Marine Ecological Classification Standard (CMECS) to metadata. 20180426 U.S. Geological Survey Alan O. Allwardt Contractor -- Information Specialist mailing and physical address

2885 Mission Street

Santa Cruz CA 95060 831-460-7551 831-427-4748 aallwardt@usgs.gov Edited metadata to add keywords section with USGS persistent identifier as theme keyword. No data were changed. 20201019 U.S. Geological Survey VeeAnn A. Cross Marine Geologist Mailing and Physical

384 Woods Hole Road

Woods Hole MA 02543-1598 508-548-8700 x2251 508-457-2310 vatnipp@usgs.gov Edited metadata to perform minor edits to bring the metadata up to current PCMSC standards. No data were changed. The metadata available from a harvester may supersede metadata bundled within a download file. Users are advised to compare the metadata dates to determine which metadata file is most recent. 20211025 U.S. Geological Survey Susan Cochran Geologist Mailing and Physical

2885 Mission Street

Santa Cruz CA 95060 831-460-7545 scochran@usgs.gov Vector String 1 0.000001 0.000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 Norcal_Baseline Baseline for Southern California USGS FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. ID Feature number. U.S. Geological Survey 1 30 SOURCE Agency that provided feature or data used to create feature. U.S. Geological Survey USGS United States Geological Survey U.S. Geological Survey ACCURACY Position accuracy of feature. U.S. Geological Survey 0 The accuracy is not given or is not known. U.S. Geological Survey TYPE Type of feature. U.S. Geological Survey Baseline Vector baseline. U.S. Geological Survey DESCR Detailed description of the feature. U.S. Geological Survey Describes additional characteristics of feature. U.S. Geological Survey mailing and physical address

Pacific Science Center

2885 Mission Street

Santa Cruz Ca 95060 USA (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. shapefile 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 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. 20211025 U.S. Geological Survey, Pacific Coastal and Marine Science Center PCMSC Science Data Coordinator mailing and physical

2885 Mission Street

Santa Cruz CA 95060-5792 US 831-427-4747 pcmsc_data@usgs.gov Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time