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Geologic Map and Digital Database of the Porcupine Wash 7.5 minute Quadrangle, Riverside County, California, USGS OFR 01-30
Entry ID: USGS_OFR01-30

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Abstract: The data set for the Porcupine Wash quadrangle has been prepared by the
Southern California Areal Mapping Project (SCAMP), a cooperative project
sponsored jointly by the U.S. Geological Survey and the California Division of
Mines and Geology. The Porcupine Wash data set represents part of an ongoing
effort to create a regional GIS geologic database for southern California. This
regional digital ... View entire text
Related URL
Description: Access to documentation and data for OFR 01-030
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Multimedia Sample
Small multimedia sample image
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Description:  Non-navigable .gif image of the geologic map, topographic base,
Correlation of Map and Database Units, Description of Map and Database
Units and key to point and line symbols. 64 kilobytes.

Geographic Coverage
Spatial coordinates   
  N: 33.88   S: 33.75   E: -115.75   W: -115.88

Data Set Citation
Dataset Originator/Creator: Robert E. Powell; Pamela M. Cossette (digital cartography)
Dataset Title: Geologic map and digital database of the Porcupine Wash 7.5 minute quadrangle, Riverside County, California
Dataset Series Name: U.S. Geological Survey Open-File Report
Dataset Release Date: 2001
Dataset Release Place: Menlo Park, California
Dataset Publisher: U.S. Geological Survey
Version: Version 1.0
Data Presentation Form: Vector digital data
Online Resource:
Temporal Coverage
Start Date: 1973-01-01
Stop Date: 2000-12-31
Data Resolution
Latitude Resolution: 0.000001 m
Longitude Resolution: 0.000001 m
MAPS Ancillary Description
Access Constraints None
Use Constraints Spatial Resolution. Use of this digital geologic map should not
violate the spatial resolution of the data. The Porcupine Wash
geologic map and database was developed using digital orthophotograph
quarter quadrangles (DOQQs) as a base. DOQQs have a pixel resolution
of 1 m and are accurate to a scale of 1:12,000 (1 in = 1,000 ... View entire text
Data Set Progress
Originating Center
Data Center
Publications-Western Region,Geological Division, U.S. Geological Survey, U.S. Department of the Interior Supplemental Info
Data Center URL:
Dataset ID: USGS Open-File Report 01-30

Data Center Personnel
Phone: 650-329-5015
Fax: 650-329-5119
Email: cdonlin at
Contact Address:
U.S. Geological Survey
Geology Division
345 Middlefield Road
City: Menlo Park
Province or State: California
Postal Code: 94025
Country: USA
Distribution Media: online
Distribution Size: 5.5 megabytes
Distribution Format: Arc/Info export
Fees: none
Phone: (509) 368-3120
Fax: (509) 368-3199
Email: rpowell at
Contact Address:
U.S. Geological Survey
904 West Riverside Avenue, Rm. 202
City: Spokane
Province or State: WA
Postal Code: 99201-1087
Country: USA
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Powell, R.E., 1981, Geology of the crystalline basement complex, eastern
Transverse Ranges, southern California: Constraints on regional tectonic
interpretation [Ph.D. thesis]: Pasadena, California Institute of Technology, 441 p.
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Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2001-02-23
Last DIF Revision Date: 2016-01-27

Link to Web Site