GIS Data Download Sources

These web sites represent sources of geospatial data that can be freely downloaded. This list is not meant to be comprehensive of online data sources.

• Arizona Independent Redistricting Commission
  The Independent Redistricting Commission's mission is to administer the fair and balanced redistricting of the Congressional and Legislative districts for the State of Arizona.
  
  
• Arizona National Biological Information Infrastructure
  The purpose of the NBII is to facilitate finding biological data and to integrate data from different sources.
  
  
• Arizona Regional Image Archive
  Digital raster graphics and digital orthophoto quarter-quads for the Sonoran desert region of the Southwest US and northern Mexico.
  
  
• Arizona State University Geological Remote Sensing Lab Imagery
  Satelite imagery, primarily useful in geologic research.
  
  
• Bureau of Land Management FTP site
  FTP site only. Various data sets and utilities.
  
  
• NASA Distributed Active Archive Centers
  The NASA Distributed Active Archive Centers process, archive, document, and distribute data from NASA's past and current Earth science research satellites and field measurement programs.
  
  
• NASA Global Change Master Directory
  A comprehensive directory about Earth science and global change data.
  
  
• NOAA National Environmental Satelite, Data, and Information Service
  Access to environmental data from satelites and other sources.
  
  
• NOAA Near Real Time Spatial Data Products for GIS
  Satellite weather data from GOES, AVHRR, and ground based RADAR.
  
  
• NRCS Soil Survey
  Nationwide coverage of detailed and general soil maps.
  
  
• Pima Association of Governments Regional Data Center
  Selected Pima County data sets
  
  
• Pima County Geographic Data Library
  Pima County data sets
  
  
• University of Arizona General Reference Library
  Various Arizona datasets.
  
  
• USDA NRCS Geospatial Data Gateway
  Natural resource and environmental data from the federal government
  
  
• USGS Geographic Data Download
  Digital elevation models and digital line graphs at several scales.
  
  
• USGS GISDATA Map Studio
  Map viewers and data from the USGS
  
  
• Verde Watershed Coverages
  Verde River Watershed data sets, central Arizona.