| Content Citation |
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Title of Content: |
USGS 7.5-minute Digital Elevation Models for San Francisco Bay Area
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Type of Content: |
raster digital data |
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Content Publisher: |
U. S. Geological Survey |
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Publication Place: |
Menlo Park, CA |
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Publication Date: |
2000 |
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| Content Description |
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Content Summary:
The 7.5-minute Digital Elevation Models (DEM) in this dataset have 10 meter post spacings and are projected in UTM Zone 10, NAD 83. Elevations may be meters or feet. The format is defined by the 1998 DEM Standard (http://rockyweb.cr.usgs.gov/nmpstds/demstds.html). These ASCII DEMs are further compressed by the UNIX utility, gzip. As of November 14, 2006, the USGS no longer offers Digital Elevation Models. For the most recent elevation coverage, please see the National Elevation Dataset (http://ned.usgs.gov/). |
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Content Purpose:
Geospatial elevation data are utilized by the scientific and resource management communities for global change research, hydrologic modeling, resource monitoring, mapping, and visualization applications. |
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| Time Period of Content |
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Beginning Date: |
1999 |
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Ending Date: |
2000 |
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| Content Status |
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Progress: |
Complete |
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Update Frequency: |
None Planned |
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| Content Keywords |
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Theme Keywords: |
land surface, topography, terrain elevation, 7.5-minute DEM, DEM, raster, USGS |
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Place Keywords: |
California, San Francisco Bay and Delta, Alameda County, Sonoma County, Napa County, Marin County, Contra Costa County, San Francisco County, San Mateo County, Santa Clara County, Solano County |
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| Spatial Data Information |
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Data Type: |
raster digital data
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Data Format: |
USGS Native Format DEM (1998 standard) |
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Data Projection: |
Universal Transverse Mercator
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| Access and Usage Information |
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Access Constraints: |
None. |
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Use Constraints: |
None. Acknowledgement of the U.S. Geological Survey would be appreciated in products derived from these data. |
