Cheryl Hapke David Reid 2007 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/SCal.zip https://pubs.usgs.gov/of/2007/1112/ Cheryl Hapke David Reid Krystal Green Mark Borrelli 2007 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/ socal_intersects 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 Complete None planned -119.998078 -117.131578 34.493110 32.542111 -119.998076-117.13158932.57626834.456397 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 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. 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. No additional checks for topological consistency were performed on the data. 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 cliff edge 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 (https://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. 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 11 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 Entity point 22939 SimplePointFALSE12719TRUEFALSE 0.000001 0.000001 Decimal degrees North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 GCS_North_American_1983 Socal_intersects Cliff Edge-Transect Intersections U.S. Geological Survey Feature Class12719 FID Internal feature number ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry U.S. Geological Survey Digital Shoreline Analysis System (DSAS) version 3.0 Himmelstoss, E.A., and Miller, T.L., 2005, User guide and tutorial for the Digital Shoreline Analysis System (DSAS) version 3.2, extension for ArcGIS v.9.0, in Thieler, E.R., Himmelstoss, E.A., Zichichi, J.L., and Miller, T.L., Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS extension for calculating shoreline change: U.S. Geological Survey Open-File Report 2005-1304 [http://pubs.er.usgs.gov/usgspubs/ofr/ofr20051304]. TransectId The object identifier value of the transect in the transect attribute table, identifies transect with which the intersection points are associated. U.S. Geological Survey Digital Shoreline Analysis System (DSAS) version 3.0 Himmelstoss, E.A., and Miller, T.L., 2005, User guide and tutorial for the Digital Shoreline Analysis System (DSAS) version 3.2, extension for ArcGIS v.9.0, in Thieler, E.R., Himmelstoss, E.A., Zichichi, J.L., and Miller, T.L., Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS extension for calculating shoreline change: U.S. Geological Survey Open-File Report 2005-1304 [http://pubs.er.usgs.gov/usgspubs/ofr/ofr20051304]. Number9 BaselineId Identifies which baseline the transect was cast from based on the baseline ID field. Useful when multiple baseline segments exist, baseline ID used by Transect. U.S. Geological Survey Digital Shoreline Analysis System (DSAS) version 3.0 Himmelstoss, E.A., and Miller, T.L., 2005, User guide and tutorial for the Digital Shoreline Analysis System (DSAS) version 3.2, extension for ArcGIS v.9.0, in Thieler, E.R., Himmelstoss, E.A., Zichichi, J.L., and Miller, T.L., Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS extension for calculating shoreline change: U.S. Geological Survey Open-File Report 2005-1304 [http://pubs.er.usgs.gov/usgspubs/ofr/ofr20051304]. Number9 ShorelineI Identifies which shoreline the transect is intersecting. U.S. Geological Survey Digital Shoreline Analysis System (DSAS) version 3.0 Himmelstoss, E.A., and Miller, T.L., 2005, User guide and tutorial for the Digital Shoreline Analysis System (DSAS) version 3.2, extension for ArcGIS v.9.0, in Thieler, E.R., Himmelstoss, E.A., Zichichi, J.L., and Miller, T.L., Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS extension for calculating shoreline change: U.S. Geological Survey Open-File Report 2005-1304 [http://pubs.er.usgs.gov/usgspubs/ofr/ofr20051304]. String254 Distance The transect length betwee the identified baseline and shoreline, distance from Baseline to Shoreline-Transect Intersect U.S. Geological Survey Digital Shoreline Analysis System (DSAS) version 3.0 Himmelstoss, E.A., and Miller, T.L., 2005, User guide and tutorial for the Digital Shoreline Analysis System (DSAS) version 3.2, extension for ArcGIS v.9.0, in Thieler, E.R., Himmelstoss, E.A., Zichichi, J.L., and Miller, T.L., Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS extension for calculating shoreline change: U.S. Geological Survey Open-File Report 2005-1304 [http://pubs.er.usgs.gov/usgspubs/ofr/ofr20051304]. Number1911 IntersectY The y-coordinate for the location point of the shoreline/transect intersection. U.S. Geological Survey Digital Shoreline Analysis System (DSAS) version 3.0 Himmelstoss, E.A., and Miller, T.L., 2005, User guide and tutorial for the Digital Shoreline Analysis System (DSAS) version 3.2, extension for ArcGIS v.9.0, in Thieler, E.R., Himmelstoss, E.A., Zichichi, J.L., and Miller, T.L., Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS extension for calculating shoreline change: U.S. Geological Survey Open-File Report 2005-1304 [http://pubs.er.usgs.gov/usgspubs/ofr/ofr20051304]. Number1911 IntersectX The x-coordinate for the location point of the shoreline/transect intersection. U.S. Geological Survey Digital Shoreline Analysis System (DSAS) version 3.0 Himmelstoss, E.A., and Miller, T.L., 2005, User guide and tutorial for the Digital Shoreline Analysis System (DSAS) version 3.2, extension for ArcGIS v.9.0, in Thieler, E.R., Himmelstoss, E.A., Zichichi, J.L., and Miller, T.L., Digital Shoreline Analysis System (DSAS) version 3.0, an ArcGIS extension for calculating shoreline change: U.S. Geological Survey Open-File Report 2005-1304 [http://pubs.er.usgs.gov/usgspubs/ofr/ofr20051304]. 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 0.340 https://pubs.usgs.gov/of/2007/1122/SCal.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 9.2.2.1350socal_intersects-119.998076-117.13158934.45639732.5762681-119.998076-117.13158934.45639732.5762681ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002file://\\Emihimltxp\sea_disk (e)\CA_cliffs\metadata_1\review\May2007_final\Southern\socal_intersects.shpLocal Area Network0.340ShapefileGCS_North_American_1983127192007050116102700200809161409250020080916