Cheryl HapkeDavid Reid20061.0vector digital dataOpen-File Report2006-1251Pacific Science Center, Santa Cruz, CAU.S. Geological Survey, Coastal and Marine Geology Programhttp://pubs.usgs.gov/of/2006/1251/SCal.zipCheryl HapkeDavid Reid20061.0Open-File Report2006-1251Pacific Science Center, Santa Cruz, CAU.S. Geological Survey, Coastal and Marine Geology Programhttp://pubs.usgs.gov/of/2006/1251/socal1852_1889There are critical needs for a nationwide compilation of reliable shoreline data. To meet these needs, the U.S. Geological Survey (USGS) has produced a comprehensive database of digital vector shorelines by compiling shoreline positions from pre-existing historical shoreline databases and by generating historical and modern shoreline data. Shorelines are compiled by state and generally correspond to one of four time periods: 1800s, 1920s-1930s, 1970s, and 1998-2002. Each shoreline may represent a compilation of data from one or more sources for one or more dates provided by one or more agencies. Details regarding source are provided in the 'Data Quality Information' section of this metadata report. Shoreline vectors derived from historic sources (first three time periods) represent the high water line at the time of the survey, whereas modern shorelines (final time period) represent the mean high water line.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.en18521889ground conditionCompleteNone planned -120.001378 -117.123561 34.495086 32.499284-126.001383-123.12356832.53175734.456516GeneralShorelineHistoric ShorelineShoreline Change RateLinear Regression RateEndpoint RateBaselineBeach ErosionBeach NourishmentLIDART-sheetTp-sheetCoastal Survey MapU.S. Geological SurveyUSGSCoastal and Marine Geology ProgramCMGPESRI polyline shapefileISO 19115 Topic Categoryoceansoceans and estuariesoceans and coastalelevationGeneralCaliforniaUnited StatesNoneThis data set is not to be used for navigational purposes. 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 RichmondU.S. Geological Surveymailing and physical address

Pacific Science Center

400 Natural Bridges Drive

Santa CruzCa95060USA(831) 427-4450(831) 427-4748Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard TimeMicrosoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535Cheryl J. HapkeDavid ReidBruce M. RichmondPeter RuggieroJeff List20061.0Open-File Report2006-1219Pacific Science Center, Santa Cruz, CAU.S. Geological Survey, Coastal and Marine Geology Programhttp://pubs.usgs.gov/of/2006/1219/ShapefileThere is significant agreement of linework between adjacent shorelines. Shorelines were checked for accuracy, but no edgematching attempts were made between adjacent shorelines even if slight offsets existed.This shoreline data adequately represented the shoreline at the time of the survey. Remaining gaps in this data, if applicable, are a consequence of non-existing data or existing data that did not meet quality assurance standards.The maximum estimated positional error for this shoreline is 13.9 meters. Please visit our full report on shoreline change in the Coastline of California (http://pubs.usgs.gov/of/2006/1219/), under the heading 'Uncertainties and Errors', for a complete explanation of the measurement error.18521889ground conditionNOS T-SheetsNOAA NOS Topographic SheetsShorelines from one or more sources were sought in an effort to develop a single shoreline for each time period. Digital shorelines, if available from another agency, were acquired. If no digital shorelines were available or if a data set was incomplete, T-sheets were requested from NOAA and received as scanned raster images. T-sheets were geo-registered using ERDAS Imagine geographic imaging software by placing 6-10 well-spaced ground control points at gridline intersections. Some T-sheets may have required additional coordinate transformation information from NOAA to account for datum offsets between historical datums (USSD) and modern datums (NAD27 or NAD83). Datum transformations were applied to GCP coordinates prior to registration. Total RMS error for the rectification process was maintained below 1 pixel, which translates to approximately 4m at a scale of 1:20,000 and 1.5m at a scale of 1:10,000. Geo-registered T-sheets were loaded in ArcView and vector shorelines were digitized. Quality assessments were performed and shorelines were edited to remove any overlap between adjacent shorelines. No edgematching between adjacent shorelines was attempted. Finally, shorelines from all sources were merged to produce a single shoreline for the period. The final shoreline was coded with 6 attribute fields (ID, Type, Date, Descr, Source, and Accuracy) required for the Digital Shoreline Analysis System (DSAS), which was used to calculate shoreline change rates. The attributes reflect the source of the data and the original survey year.Bruce RichmondU.S. Geological Surveymailing and physical address

Pacific Science Center

400 Natural Bridges Drive

Santa CruzCa95060USA(831) 427-4450(831) 427-4748Monday through Friday, 8 a.m. to 5 p.m., Pacific Standard TimeData 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_NADCON20070716Emily HimmelstossU.S. Geological SurveyGeologistmailing and physical address

384 Woods Hole Road

Woods HoleMA02543-1598USA508-548-8700 x2262(508) 457-2310ehimmelstoss@usgs.govArcGIS 9.2 ToolboxVectorString71SimplePolylineFALSE71TRUEFALSENorth American Datum of 1983 Geodetic Reference System 80 6378137.0400000 298.257222 GCS_North_American_1983Decimal degrees0.0000000.000000 SoCal1852_1889Vector Shoreline from NOS T-SheetsUSGSFeature Class71FIDInternal feature number.ESRISequential unique whole numbers that are automatically generated.ShapeFeature geometry.ESRICoordinates defining the features.IDFeature number.U.S. Geological Survey140677Number6TYPEType of feature.U.S. Geological SurveyShorelineVector shoreline.U.S. Geological SurveyString20DESCRDetailed description of the feature.U.S. Geological SurveyDescribes additional characteristics of the feature.String64SOURCEAgency that provided feature or data used to create feature.U.S. Geological SurveyNOAA NOS T-SheetsNOAAU.S. Geological SurveyString32ACCURACYPosition accuracy of feature.U.S. Geological Survey00metersNumber3DATE_DATE_String10U.S. Geological Surveymailing and physical address

Pacific Science Center

400 Natural Bridges Drive

Santa CruzCa95060USA(831) 427-4450(831) 427-4748Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard TimeDownloadable Data: USGS Open-File Report 2006-1251Although 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.SHP20060901ESRI polyline shapefileSeven files comprise the ArcView shapefile: <filename>.dbf, <filename>.shp, <filename>.shx, <filename>.prj, <filename>.avl, <filename>.sbx, <filename>.sbnzip archive0.1610.161http://pubs.usgs.gov/of/2006/1251/SCal.ziphttp://pubs.usgs.gov/of/2006/1251/#gisData may be downloaded via the World Wide Web (WWW).NoneThese 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.20070215U.S. Geological Surveymailing and physical address

Pacific Science Center

400 Natural Bridges Drive

Santa CruzCa95060USA(831) 427-4450(831) 427-4748Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard TimeFGDC Content Standards for Digital Geospatial MetadataFGDC-STD-001-1998local timeNoneNoneen20070301http://www.esri.com/metadata/esriprof80.htmlESRI Metadata ProfileMicrosoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350socal1852_1889-126.001383-123.12356834.45651632.5317571-126.001383-123.12356834.45651632.5317571ISO 19115 Geographic Information - MetadataDIS_ESRI1.0dataset002file://\\EMIHIMDTXP2\CA_natass\CA_updates\fixed_proj\old_incorrect\California_South\Geographic\socal1852_1889.shpLocal Area Network0.161ShapefileGCS_North_American_1983712007071614043200200707161404400020070716