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California data can be downloaded in Arc/INFO format files. Data themes Include crop yield information, soil interpretation ratings, and plant composition and percentage

The project provides a variety of kinds of data related to fish resources and maintains the 1:100,000 scale hydrography layer for the Pacific…

Data for eastern Oregon and Washington, Idaho, western Wyoming, western Montana and portions of northern Utah and northern Nevada. More than 300 different…

Search for National Park Geospatial Data by State

Geostat collects and houses a variety of data for GIS applications to suit the teaching and research needs of faculty and students as…

Sites which house data on roads, railroads, public transit, navigable waterways, commercial air routes, intermodal connections, and pipelines are included here

The data referenced are at various scales ranging from 1:12,000 to 1:500,000. They are organized by state with source, theme, spatial coverage, scale,…

Guide to Mostly On-Line and Mostly Free U.S. Geospatialand Attribute Data – hundreds of links to data resources

The U.S. Environmental Protection Agencys water programs and their counterparts in states and pollution control agencies are increasingly emphasizing watershed and water quality-based…

Geospatial One-Stop makes it easier, faster, and less expensive for all levels of government and the public to access geospatial information.