Service Description: Gravity contours representing the depth below ground surface of the crystalline basement surface beneath central California, derived from the USGS dataset "The surface of crystalline basement, Great Valley and Sierra Nevada, California: A digital map database."
Service ItemId: 6c42559c801546d98d3fed07f5f78372
Has Versioned Data: false
Max Record Count: 2000
Supported query Formats: JSON
Supports applyEdits with GlobalIds: False
Supports Shared Templates: False
All Layers and Tables
Layers:
Description: This dataset represents the depth to crystalline basement within the Central Valley of California. This dataset was derived from the gravity elevation contours provided in the USGS report "
The surface of crystalline basement, Great Valley and Sierra Nevada, California: A digital map database." This basement extends westward from the exposed Sierra Nevada, under the sedimentary fill of the Great Valley, and reaches mid-crustal depths beneath the eastern Coast Ranges. The contours are based on a combination of data sources, including topographic information from the Sierra Nevada, well data from oil and gas exploration in the Great Valley, and seismic profiles in the San Joaquin Valley.
The crystalline basement elevation contours were reprojected from NGVD29 to NAVD88, interpolated across the area of interest, and then subtracted from the
USGS National Elevation dataset resampled to a resolution of 2 km. The resulting depth contours were smoothed and clipped to
the extent of the alluvial deposits in the Central Valley.
The California Department of Water Resources (DWR) makes no warranties or guarantees — either expressed or implied — as to the completeness, accuracy, or correctness of the data. DWR neither accepts nor assumes liability arising from or for any incorrect, incomplete, or misleading subject data.
PROJCS["NAD_1983_Albers",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-120.0],PARAMETER["Standard_Parallel_1",29.5],PARAMETER["Standard_Parallel_2",45.5],PARAMETER["Latitude_Of_Origin",23.0],UNIT["Meter",1.0]]
Initial Extent:
XMin: -290569.816911264
YMin: 1735435.8708359
XMax: -68155.5807139624
YMax: 1938634.57719292
Spatial Reference: PROJCS["NAD_1983_Albers",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-120.0],PARAMETER["Standard_Parallel_1",29.5],PARAMETER["Standard_Parallel_2",45.5],PARAMETER["Latitude_Of_Origin",23.0],UNIT["Meter",1.0]]
Full Extent:
XMin: -250294.634220038
YMin: 1271662.58011555
XMax: 135494.766110655
YMax: 1975095.08283081
Spatial Reference: PROJCS["NAD_1983_Albers",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-120.0],PARAMETER["Standard_Parallel_1",29.5],PARAMETER["Standard_Parallel_2",45.5],PARAMETER["Latitude_Of_Origin",23.0],UNIT["Meter",1.0]]
Units: esriMeters
Child Resources:
Info
Supported Operations:
Query
ConvertFormat
Get Estimates