|contact, certain||Observed contact|
|county boundary||Boundary around the counties|
|map boundary||Boundary of mapped area|
|water boundary||Boundary of inland waters|
|lsu||landslide deposit, identification uncertain|
|nls||not landslide deposit|
|Range of values|
25 USGS Quadrangles in the Coverage GRDPYS.SHP.PAT: Richmond Briones Valley Oakland East Las Trampas Ridge Diablo Tassajara Byron Hot Springs Clifton Court Forebay (formerly Bethany) San Leandro Hayward, Dublin Livermore Altamont Midway Newark Niles La Costa Valley Mendenhall Springs Cedar Mountain Lone Tree Creek Milpitas Calaveras Reservoir Mt. Day Eylar Mountain Mt. Boardman Oakland West Hunters Point Redwood Point Mountain View
To provide information to the public on the landslide probability by studying previous landslide deposits. The study sought to provide, in forms understandable and usable by non-specialists, the earth-science information needed to solve problems related to growth and development in the nine-county, 7,400-square-mile San Francisco Bay Region.
Are there legal restrictions on access or use of the data?
This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
This database, identified as 'Landslides in Alameda County, California, a digital database extracted from preliminary photointerpretation maps of surficial deposits by T.H. Nilsen in USGS Open-file Report 75-277', has been approved for release and publication by the Director of the USGS. Although this database has been reviewed and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. This database is released on condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from its use.
|Data format:||map of landslide deposits in format ARCE (version 7.1.1) Size: 2.7|
|Data format:||map of landslide deposits in format Shapefile (version 1.0) Size: 5|