Open-File Report 98-795

Preliminary Geologic Map of the San Jose 30 X 60 Minute Quadrangle, California: A Digital Database

by Carl M. Wentworth, M. Clark Blake, Jr., Robert J. McLaughlin, and Russell W. Graymer

View the revision list as an unformatted, text-only file: of98-795_1a.txt (6 kB)

DATABASE DESCRIPTION

Download the database explanation pamphlet as a formatted PostScript plot file: of98-795_2b.ps (152 kB)

View the database explanation pamphlet as a formatted PDF file: of98-795_2c.pdf (35 kB)

GEOLOGIC DESCRIPTION

Download the geologic explanation pamphlet as a formatted PostScript plot file: of98-795_3b.ps (1.1 MB)

View the geologic explanation pamphlet as a formatted PDF file: of98-795_3c.pdf (256 kB)

DATA

Digital databases are available for GIS users in ARC/INFO Export and ARCVIEW shapefile formats. Those who download digital data should also download the descriptive pamphlet.

Some of the ARC/INFO Export files have been compressed with gzip. The ARCVIEW shapefiles have been packaged in tar files and in some cases, compressed with gzip. File sizes (in parentheses) are for the gzip-compressed download file, followed by the size of the file when uncompressed.

GEOLOGIC DATABASE

ARC/INFO Export Files

• Geology (6 MB, 32 MB) of98-795_4a.e00.gz
• Blocks (152 KB) of98-795_4b.e00
• Annotation (1.2 MB) of98-795_4c.e00

  ARCVIEW Shapefiles

• Geology (20 MB, 30 MB) of98-795_4d.tar.gz
• Blocks (79 KB) of98-795_4e.tar
• Annotation (648 KB) of98-795_4f.tar

QUADRANGLE INDEX DATABASE

ARC/INFO Export Files

• Geology (128 KB) of98-795_5a.e00

  ARCVIEW Shapefiles

• Geology (90 KB) of98-795_5b.tar

TOPOGRAPHIC BASE LAYERS

ARC/INFO Export Files

• Drainage (14.2 MB) of98-795_6a.e00
• Index Contours (3.8 MB) of98-795_6b.e00
• Intermediate Contours (14.9 MB) of98-795_6c.e00
• Culture (19 MB) of98-795_6d.e00
• Land Lines (1 MB) of98-795_6e.e00

  ARCVIEW Shapefiles

• Drainage (8.8 MB) of98-795_6f.tar
• Index Contours (2.3 MB) of98-795_6g.tar
• Intermediate Contours (8.8 MB) of98-795_6h.tar
• Culture (15 MB) of98-795_6i.tar
• Land Lines (800 KB) of98-795_6j.tar

DATABASE PACKAGES

• Geologic map layers (of98-795_4), and the quadrangle index (of98-795_5) packaged together in a single gzip compressed tar file in ARC/INFO export format (7 MB, 36 MB) of98-795_10a.tar.gz
• Geologic map layers (of98-795_4), and the quadrangle index (of98-795_5) packaged together in a single gzip compressed tar file in ARCVIEW shapefile format (21 MB, 33 MB) of98-795_10b.tar.gz

PLOTFILES

Plotfiles are available for those who wish to produce paper copies of maps prepared from the digital data. These maps have been edited to conform as much as possible to standard U.S. Geological Survey format for geologic maps. The plotfiles are in PostScript and PDF formats. Note that these plotfiles are formatted to plot on 29 x 17 inch or larger sheets, so a large format color plotter is required to produce a paper map. Alternatively, some software can import PostScript files, allowing the user to manipulate the map image as desired. Those who download plotfiles should also download the descriptive pamphlet.

To download one of the plotfile packages in PostScript format (compressed with gzip - compressed size is listed first), select one of the following:

• Geologic Map (18.1 MB, 96 MB) of98-795_7a.ps.gz
• Correlation Diagram (1.5 MB) of98-795_8a.ps
• Postscript plotfile package - both of the above files (19 MB, 99 MB) of98-795_11a.tar.gz

To download one of the plotfile packages in PDF format (not compressed), select one of the following:

• Geologic Map (17.6 MB) of98-795_7b.pdf
• Correlation Diagram (472 KB) of98-795_8b.pdf
• PDF plotfile package - both of the above files (19 MB) of98-795_11b.tar

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