Sources Of Free GIS Data

Free National GIS Data:

Below you will find sources of free national GIS data layers ie. shapefiles, e00, DEM, etc.

Geo Community

Geo Data

National Atlas

USGS

National Historical Geographic Information System

State Cultural Data:
(State level websites will usually have county level data, including imagery and natural resource data.)

Alabama

Alaska

Arizona

Arkansas

California

Colorado

Connecticut

Delaware

Dist. Of Columbia

Florida

Georgia

Hawaii

Idaho

Illinois

Indiana

Iowa

Kanses

Kentucky

Louisiana

Maine

Maryland

Massachusetts

Michigan

Minesota

Mississippi

Missouri

Montana

Nebraska

Nevada

New Hampshire

New Jersey

New Mexico

New York

North Carolina

North Dakota

Ohio

Oklahoma

Oregon

Pennsylvania

Rhode Island

South Carolina

South Dakota

Tennessee

Texas

Texas – TNRIS

Utah

Vermont

Virginia

Washington

West Virginia

Wisconsin

Wyoming

Imagery:

Video Tutorials on how to get free High Resolution imagery and free Historical Imagery

Earth Resource Observation and Science (EROS) Center

Earth Explorer (Landsat, AVHRR and aerial photos)

Global Land Cover Facility (ASTER, Landsat, MODIS, AVHRR)

Global Visualization Viewer (Free ASTER, MODIS and Landsat Imagery)

Landsat.org (Large collection of Landsat imagery, not all free)

Global Mapping Solutions (Everything from aerial photography to digital street maps)

GASearch Oil & Gas Price Information.