Identification_Information: Citation: Citation_Information: Originator: Cheryl Hapke Originator: David Reid Publication_Date: 2005 Title: Long-Term Transect-Shoreline Intersection Points for Southern California Generated to Calculate Shoreline Change Rates Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-XXX Publication_Information: Publication_Place: U.S. Geological Survey, Center for Coastal and Watershed Studies, St. Petersburg, FL Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2006/1251 Larger_Work_Citation: Citation_Information: Originator: Cheryl Hapke Originator: David Reid Originator: Bruce Richmond Publication_Date: 2005 Title: National Assessment of Shoreline Change: Part X, Historical Shoreline Changes and Associated Coastal Land Loss Along Sandy Shorelines of California Series_Information: Series_Name: Open-File Report Issue_Identification: 2005-XXX Publication_Information: Publication_Place: U.S. Geological Survey, Pacific Science Center Publisher: U.S. Geological Survey, Coastal and Marine Geology Program Online_Linkage: http://coastal.er.usgs.gov/national-assessment/ Description: Abstract: 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). Purpose: 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 USGS National Assessment Project. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -119.998088 East_Bounding_Coordinate: -117.131396 North_Bounding_Coordinate: 34.493110 South_Bounding_Coordinate: 32.542111 Keywords: Theme: Theme_Keyword_Thesaurus: General Theme_Keyword: Shoreline Theme_Keyword: Historic Shoreline Theme_Keyword: Shoreline Change Rate Theme_Keyword: Linear Regression Rate Theme_Keyword: Endpoint Rate Theme_Keyword: Baseline Theme_Keyword: Beach Erosion Theme_Keyword: Beach Nourishment Theme_Keyword: LIDAR Theme_Keyword: T-sheet Theme_Keyword: Tp-sheet Theme_Keyword: Coastal Survey Map Place: Place_Keyword_Thesaurus: General Place_Keyword: United States Place_Keyword: California Access_Constraints: None Use_Constraints: 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Science Center Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridges Drive City: Santa Cruz State_or_Province: Ca Postal_Code: 95060 Country: USA Contact_Voice_Telephone: (831)-427-4450 Contact_Facsimile_Telephone: (831)-427-4748 Hours_of_Service: Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535 Data_Quality_Information: Logical_Consistency_Report: 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. Completeness_Report: 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. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Postional Accuracy is based on position of shoreline with respect to the transect. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Cheryl Hapke Originator: David Reid Publication_Date: Unknown Title: THE NATIONAL ASSESSMENT OF SHORELINE CHANGE: A GIS Compilation of Vector Shorelines and Associated Shoreline Change Data for the Sandy Shorelines of the California Coast. Geospatial_Data_Presentation_Form: point data Series_Information: Series_Name: Open File Report Issue_Identification: 2006-1251 Publication_Information: Publication_Place: USGS Pacific Science Center, Santa Cruz, California Publisher: USGS Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2006/1251 Larger_Work_Citation: Citation_Information: Originator: Cheryl Hapke Originator: David Reid Originator: Bruce Richmond Originator: Peter Ruggiero Originator: Jeff List Publication_Date: Unknown Title: National Assessment of Shoreline Change: Part 3, Historical Shoreline Changes and Associated Coastal Land Loss Along sandy shorelines of the California coast Series_Information: Series_Name: Open File Report Issue_Identification: 2006-1219 Publication_Information: Publication_Place: USGS Pacific Science Center, Santa Cruz, California Publisher: USGS Coastal and Marine Geology Program Online_Linkage: http://pubs.usgs.gov/of/2006/1219 Type_of_Source_Media: Intersect Points Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: unknown Source_Currentness_Reference: ground condition Source_Citation_Abbreviation: Transect-Shoreline Intersect Points Source_Contribution: USGS Process_Step: Process_Description: 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. Process_Date: Unknown Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Pacific Science Center Contact_Person: Bruce Richmond Contact_Address: Address_Type: mailing and physical address Address: 400 Natural Bridges Drive City: Santa Cruz State_or_Province: Ca Postal_Code: 95060 Country: USA Contact_Voice_Telephone: (831)-427-4450 Contact_Facsimile_Telephone: (831)-427-4748 Hours_of_Service: Monday through Friday, 8 a.m. to 5 p.m., Pacific Standard Time Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Entity point Point_and_Vector_Object_Count: 22939 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 11 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -117.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000512 Ordinate_Resolution: 0.000512 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Socal_intersects_lt Entity_Type_Definition: Shoreline-Transect Intersections Entity_Type_Definition_Source: USGS Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: TransectId Attribute_Definition: Identifies transect with which the intersection points are associated. Attribute_Definition_Source: DSAS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Value Enumerated_Domain_Value_Definition: Transect Identification Enumerated_Domain_Value_Definition_Source: DSAS Attribute: Attribute_Label: BaselineId Attribute_Definition: Baseline ID Used by Transect Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Baseline Identification Attribute: Attribute_Label: ShorelineI Attribute_Definition: Shoreline Date Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Date Enumerated_Domain_Value_Definition: Shoreline Date associated with Transect-Shoreline Intersect Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: Distance Attribute_Definition: Distance from Baseline to Shoreline-Transect Intersect Attribute_Definition_Source: USGS Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Meters Enumerated_Domain_Value_Definition: Distance from Baseline to Shoreline-Transect Intersect Enumerated_Domain_Value_Definition_Source: USGS Attribute: Attribute_Label: IntersectX Attribute_Definition: X Coordinate of Intersect Point Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: IntersectY Attribute_Definition: Y Coordinate of Intersect Point Attribute_Definition_Source: USGS Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Center for Coastal and Watershed Studies Contact_Address: Address_Type: mailing and physical address Address: 600 4th Street South City: St. Petersburg State_or_Province: FL Postal_Code: 33701 Country: USA Contact_Voice_Telephone: (727) 803-8747 Contact_Facsimile_Telephone: (727) 803-2032 Hours_of_Service: Monday through Friday, 8 a.m. to 5 p.m., Eastern Standard Time Resource_Description: USGS Open-File Report 2004-1089 Distribution_Liability: 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. 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