Websites for Digital GIS Data

Websites for Digital GIS Data

See our Finding Data page for general guidelines about finding GIS data.

National Data Clearinghouses

Federal Geospatial Data Clearinghouse Search Engine
GIS Data Depot
The Geography Network (ESRI's data clearinghouse and map services)
Geospatial One Stop - U.S., Federal, State & Local GIS Data
National Atlas of the United States - US biology, geology, demography, environmental, water and much more.
The National Map - Access to high-quality, geospatial data from the USGS
Starting the Hunt: Guide To Mostly On-line And Mostly Free U.S. Geospatial Data
National Historical Geographic Information System - aggreagate census data with boundary files

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San Francisco Bay Area

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State of California

CaSIL: California Spatial Information Library
Includes administrative divisions (counties, congressional districts, Dept. of Fish and Game Regions, Caltrans districts); cultural geography (census block and block group data, census tracks, urban areas); facilities, structures, and buildings; political districts (assembly, congressional, senate); physical geography (bioregions, DEMs, hydrography, precipitation, etc.); transportation networks and models (roads, highways, railroads); fresh water resources and characteristics.
California Vegetation Map Catalog
Includes vegetation map data sets that cover the entire state or specific parts of the state, with an emphasis on county-level or larger data sets.
Soil Information for Environmental Modeling and Ecosystem Management
California data can be downloaded in Arc/INFO format files. Includes crop yield
information, soil interpretation ratings, and plant composition and percentage.
California Gap Analysis Project
California Earthquakes – up to date, downloadable ground motion maps in GIS format.
California Seismic Hazard Mapping
California Department of Fish and Game Data Site
Includes bathymetry, hydrological data, biological data, and more.
U.S. Fish And Wildlife Service Data for California

U.S. by State

All States: Data Depot's State List

ALABAMA KENTUCKY NORTH DAKOTA

ALASKA LOUISIANA OHIO

ARIZONA MAINE OKLAHOMA

ARKANSAS MARYLAND OREGON

CALIFORNIA MASSACHUSETTS PENNSYLVANIA

COLORADO MICHIGAN RHODE ISLAND

CONNECTICUT MINNESOTA SOUTH CAROLINA

DELAWARE MISSISSIPPI SOUTH DAKOTA

DIST. OF COLUMBIA MISSOURI TENNESSEE

FLORIDA MONTANA TEXAS

GEORGIA NEBRASKA UTAH

HAWAII NEVADA VERMONT

IDAHO NEW HAMPSHIRE VIRGINIA

ILLINOIS NEW JERSEY WASHINGTON

INDIANA NEW MEXICO WEST VIRGINIA

IOWA NEW YORK WISCONSIN

KANSAS NORTH CAROLINA WYOMING

For an extensive listing of state data sites please see the GIS Data Bookmarks section.

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International Data

For an extensive listing of foreign data sites please see the GIS Data Bookmarks section.

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Imagery

Mostly free access to satellite and aerial imagery

Arizona Regional Image Archive (AVHRR, AVIRIS, MSS, TM, SPOT for six southwestern states including California)
Canadian Geospatial Data Infrastructure
Earth Explorer (Landsat, AVHRR and aerial photos)
Earth Observing System Data Gateway (Atmosphere, land, ocean, solar and cryosphere imagery)
Geoscience Australia (Free Landsat 7, MODIS & AVHRR data)
Global Land Cover Facility (ASTER, Landsat, MODIS, AVHRR)
Global Visualization Viewer (Free ASTER, MODIS and Landsat Imagery)
Landsat.org (Huge collection of Landsat imagery; not all free)
NASA Image Server (Landsat 4,5,7)
Terraserver (Quickie air photo images from Microsoft)
University of Nevada Landsat TM Archive (State of Nevada)
USGS EROS Data Center (Many sensors with links to data access)

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Land Cover Data

The U.S. Environmental Protection Agency's Land Cover Data Directory
Global Land Cover 2000
Global Land Cover Facility
GAP analysis program (land cover data by U.S. State)
USGS Geographic Data Download (older LULC data)
National Land Cover Dataset from USGS (seamless and the most current for the US)

NLCD Class Definitions in html or EXCEL .dbf format

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Miscellaneous

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GIS Data Bookmarks

In an effort to provide GIS data sources, we are making our GIS Data Bookmarks available for download.

Just right click the link above and choose "Save Target As..."(IE) or "Save Link As..."(Firefox) to download the bookmarks file. Left clicking on the GIS Data Bookmarks link will open the file as a web page, which may also be useful.

Follow these import instructions to bring the new bookmarks into Internet Explorer or Firefox browsers.

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Last modified: October 2, 2008