Data and Maps

San Francisco Bay Area Results

Download : Raw Data - ARCGRID FORMAT

1990 Dasymetric Data- San Francisco Bay Area (4 MB)

2000 Dasymetric Data- San Francisco Bay Area (4 MB)

Download : Maps-PDF Format

1990 Dasymetric Map - San Francisco Bay Area (2.5 MB)

2000 Dasymetric Map - San Francisco Bay Area (2.5 MB)

New Release: Dasymetric Mapping Tool – ArcGIS10 (BETA version)

NEW RELEASE: ArcGIS 10 Toolbox (Python)

Download Zip File of Dasymetric Mapping Tool

• Installation and ReadMe File
• Tool Functionality and Description

* Running the tool on datasets of various sizes will impact Run Times. Testing has been done on small medium and large datasets

• Population Data with 50 records = 30 seconds
• Population Data with 1000 records = 9 minutes
• Population Data with 15,000 records = 6 hrs

*Recommendation – If you have large population datasets, (i.e. Census Blocks for large areas), consider subsetting data into smaller pieces.

Previously Released Versions

USGS Disclaimers

References to non USGS products and services are provided for information only and do not constitute endorsement or warranty, express or implied, by the USGS, USDOI, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

The furnished computer programs and scripts are accepted and used by the recipient individual or group entity with the express understanding that the United States Government makes no warranties, expressed of implied, concerning the accuracy, completeness, reliability, usability, or suitability for any particular purpose of the information or data contained in the programs, or furnished in connection therewith, and the United States shall be under no liability whatsoever to any such individual or group entity by reason of use thereof.