Hapke, Cheryl, and Reid, David, Unknown, Central California Shoreline Bias Values: Open-File Report 2006-1251, U.S. Geological Survey, Coastal and Marine Geology Program, U.S. Geological Survey, Pacific Science Center, Santa Cruz, California.This is part of the following larger work.Online Links:
Moore, Laura, Ruggiero, Peter, and List, Jeff, 2006, Comparing mean high water and high water line shorelines: Should proxy-datum offsets be incorporated in shoreline change analysis.: Journal of Coastal Research v.22, n.4, pp. 894-905, USGS Coastal and Marine Geology Program, USGS Pacific Science Center, Santa Cruz California.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 0.001024
Ordinates (y-coordinates) are specified to the nearest 0.001024
Planar coordinates are specified in meters
The horizontal datum used is North American Datum of 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.400000.
The flattening of the ellipsoid used is 1/294.978698.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
Sequential Numbers defining the features.
Describes additional characteristics of feature.
| Range of values | |
|---|---|
| Minimum: | 10.1 |
| Maximum: | 24.2 |
| Units: | meters |
| Resolution: | 0.1 |
| Range of values | |
|---|---|
| Minimum: | 5.7 |
| Maximum: | 15.9 |
| Units: | meters |
| Resolution: | 0.1 |
| Range of values | |
|---|---|
| Minimum: | 9.9 |
| Maximum: | 27.5 |
| Units: | meters |
| Resolution: | 0.1 |
(831)-427-4450 (voice)
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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.
Hapke, Cheryl, and Reid, David, Unknown, 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.: Open-File Report 2006-1251, U.S. Geological Survey, Coastal and Marine Geology Program, U.S. Geological Survey, Pacific Science Center, Santa Cruz, California.This is part of the following larger work.Online Links:
Hapke, Cheryl, Reid, David, Richmond, Bruce, Ruggiero, Peter, and List, Jeff, Unknown, National Assessment of Shoreline Change: Part 3, Historical Shoreline Changes and Associated Coastal Land Loss Along the Sandy Shorelines of California Coast: Open File Report 2006-1219, U.S. Geological Survey, Coastal and Marine Geology Program, U.S. Geological Survey, Pacific Science Center, Santa Cruz.Online Links:
Person who carried out this activity:
(831)-427-4450 (voice)
(831)-427-4748 (FAX)
The bias uncertainty, averaged over 815 1-km sections of the California coast, was approximately 18 m with an average uncertainty of approximately 8.7m. Please see the Open File Report for more information (<http://pubs.usgs.gov/of/2006/1219/>)
The bias, averaged over 815 1-km sections of the California coast, was approximately 18 m with an average uncertainty of approximately 8.7m.
The proxy-datum bias, and the associated uncertainty, is calculated at each of the 1-km blocks in which the average beach slope has been calculated. The nearest WIS station, wave buoy, and tide gage to each individual 1-km block were used in the application of Equation 1. Once the bias was calculated, it was incorporated into DSAS and applied on a transect-by-transect basis, so that the estimated bias is removed from the final long- and short-term shoreline change rates.
Are there legal restrictions on access or use of the data?
- 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.
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USGS Open-File Report 2006-1219
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.
| Data format: | ESRI Shapefile Seven files comprise the ArcView shapefile: <filename>.dbf, <filename>.shp, <filename>.shx, <filename>.prj, <filename>.avl, <filename>.sbx, <filename>.sbn Size: 0.038 |
|---|---|
| Network links: |
USGS Pacific Science Center |
(727) 803-8747 (voice)
(727) 803-2032 (FAX)
taram@usgs.gov