Vectorized Shoreline of Southern California Derived from 1998 Lidar Source Data

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Cheryl Hapke
Originator: David Reid
Publication_Date: Unknown
Title:
Vectorized Shoreline of Southern California Derived from 1998 Lidar Source Data
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1251
Publication_Information:
Publication_Place:
U.S. Geological Survey, Pacific Science Center, Santa Cruz, California
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
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 the Sandy Shorelines of California
Series_Information:
Series_Name: Open-File Report
Issue_Identification: 2006-1219
Publication_Information:
Publication_Place: U.S. Geological Survey, Pacific Science Center, Santa Cruz
Publisher: U.S. Geological Survey, Coastal and Marine Geology Program
Online_Linkage: <http://pubs.usgs.gov/of/2006/1219>
Description:
Abstract:
There are critical needs for a nationwide compilation of reliable shoreline data. To meet these needs, the 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.
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:
Range_of_Dates/Times:
Beginning_Date: 1998
Ending_Date: 1998
Currentness_Reference: ground condition
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -119.998365
East_Bounding_Coordinate: -117.131585
North_Bounding_Coordinate: 34.493236
South_Bounding_Coordinate: 32.541990
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:
This 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.
Point_of_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., 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:
There 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.
Completeness_Report:
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.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
The maximum positional error for this shoreline, considered independently, is 1.5m. However, if the lidar mean high water shoreline (mhwl) is used for comparison with other high water shorelines (hwl), an additional shoreline proxy offset must be considered. When the offset error is considered, as it pertains to lidar shorelines of the coastline of California, it varies based on beach slope, wave height, wave length, and tide level. Calculations of these parameters along the open coastline of California were made in order to quantify this bias offset. Please visit our full report on shoreline change along the sandy shoreline of the coast of California (<http://pubs.usgs.gov/of/2006/1219/>), under the heading 'Uncertainties and Errors', for a complete explanation of the measurement error.
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: vector digital 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 the Sandy Shorelines of California Coast
Series_Information:
Series_Name: Open File Report
Issue_Identification: 2006-1219
Publication_Information:
Publication_Place: 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: Lidar Vector Shoreline
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 19980410
Source_Currentness_Reference: ground condition
Source_Citation_Abbreviation: Lidar
Source_Contribution: USGS/NASA Airborne Topographic Mapper
Process_Step:
Process_Description:
The USGS in collaboration with NASA, used the NASA Airborne Topographic Mapper (ATM II and III) mounted on a Twin Otter Aircraft to map coastal beaches. The raw data was georeferenced at elevation points every few square meters. The original data from ATM was collected in WGS 84, ITRF 97, in a geographic (lat/long) coordinate system with irregular spacing. The data was then converted to NAD 83 and NAVD 88. The shoreline generation involved an analysis of shore-normal profiles at 20m intervals alongshore. First, a shore-parallel reference line was digitized as a permanent baseline for any future shoreline generation. Profiles were assessed at 20m intervals perpendicular to the reference line. Each profile consisted of a 4m wide swath of data points. An algorithm determined the shoreline position for each profile based on a regression fit through the foreshore of the profile. The function was evaluated at the mean high water (mhw) level to identify the horizontal position of the shoreline. Results were only accepted if the R-squared value of the regression was significant to the 95% confidence level. The shoreline point solutions were then quality checked in ArcView GIS software against a gray scale elevation grid of the same data. Point solutions were connected to produce a continuous vector shoreline in shapefile format.
Process_Date: Unknown
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Bruce Richmond
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., 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: String
Point_and_Vector_Object_Count: 15527
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_1998
Entity_Type_Definition: Vector Shoreline from Lidar Overflight
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: ACCURACY
Attribute_Definition: Position accuracy of feature.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: 0
Enumerated_Domain_Value_Definition: The accuracy is not given or is not known.
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: Shape
Attribute_Definition: Feature geometry.
Attribute_Definition_Source: ESRI
Attribute_Domain_Values:
Unrepresentable_Domain: Coordinates defining the features.
Attribute:
Attribute_Label: ID
Attribute_Definition: Feature number.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 40677
Attribute:
Attribute_Label: TYPE
Attribute_Definition: Type of feature.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Shoreline
Enumerated_Domain_Value_Definition: Vector shoreline.
Enumerated_Domain_Value_Definition_Source: U.S. Geological Survey
Attribute:
Attribute_Label: DESCR
Attribute_Definition: Detailed description of the feature.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Describes additional characteristics of the feature.
Attribute:
Attribute_Label: SOURCE
Attribute_Definition: Agency that provided feature or data used to create feature.
Attribute_Definition_Source: U.S. Geological Survey
Attribute_Domain_Values:
Unrepresentable_Domain: Describes source data of the feature.
Attribute:
Attribute_Label: DATE_
Attribute_Definition: Date of Lidar Over Flight
Attribute_Definition_Source: USGS
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 19980408
Range_Domain_Maximum: 20021002
Distribution_Information:
Distributor:
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
Resource_Description: USGS Open-File Report 2006-1219
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.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ESRI Shapefile
Format_Version_Number: 20060901
Format_Specification:
Seven files comprise the ArcView shapefile: <filename>.dbf, <filename>.shp, <filename>.shx, <filename>.prj, <filename>.avl, <filename>.sbx, <filename>.sbn
File_Decompression_Technique: no compression applied
Transfer_Size: 1.361
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Network_Resource_Name: USGS Pacific Science Center
Fees: None
Metadata_Reference_Information:
Metadata_Date: 20060826
Metadata_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
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998
Metadata_Time_Convention: local time
Metadata_Extensions:
Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>
Profile_Name: ESRI Metadata Profile
Generated by mp version 2.9.1 on Wed Oct 04 16:56:33 2006