Hapke, Cheryl, and Reid, David, Unknown, Vectorized Shoreline of Central California Derived from 1998-2002 Lidar Source Data: 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: 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:
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.
| Value | Definition |
|---|---|
| 0 | The accuracy is not given or is not known. |
Coordinates defining the features.
| Range of values | |
|---|---|
| Minimum: | 1 |
| Maximum: | 40677 |
| Value | Definition |
|---|---|
| Shoreline | Vector shoreline. |
Describes additional characteristics of the feature.
Describes source data of the feature.
| Range of values | |
|---|---|
| Minimum: | 19980408 |
| Maximum: | 20021002 |
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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, USGS Coastal and Marine Geology Program, USGS 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, USGS Coastal and Marine Geology Program, USGS Pacific Science Center, Santa Cruz, California.Online Links:
Person who carried out this activity:
(831)-427-4450 (voice)
(831)-427-4748 (FAX)
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.
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.
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.
Are there legal restrictions on access or use of the data?
- 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.
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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 (version 20060901) Seven files comprise the ArcView shapefile: <filename>.dbf, <filename>.shp, <filename>.shx, <filename>.prj, <filename>.avl, <filename>.sbx, <filename>.sbn Size: 1.338 |
|---|---|
| Network links: |
USGS Pacific Science Center |
(831)-427-4450 (voice)
(831)-427-4748 (FAX)