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United States Spatial Data - General
The Geospatial One-Stop is a portal that serves as a public gateway for improving access to geospatial information and data under the Geospatial One-Stop e-government initiative. Users can find Federal, State and Local GIS data.
The National Map
The National Map is a collaborative effort among the USGS and other Federal, State, and local partners to improve and deliver topographic information for the Nation. The geographic information available from The National Map includes orthoimagery (aerial photographs), elevation, geographic names, hydrography, boundaries, transportation, structures, and land cover. Other types of geographic information can be added within the viewer or brought in with The National Map data into a Geographic Information System to create specific types of maps or map views.
Access, view, and download information from geospatial databases containing a broad spectrum of data produced by the USGS and other government agencies.
OpenTopography facilitates community access to high-resolution, Earth science-oriented, topography data, and related tools and resources.
United States Spatial Data - Thematic
Montana Geographic Information Clearinghouse
A comprehensive collection of geospatial data for Montana.
National Park Service Geography and Mapping Technologies
Discover & download GIS data for National Parks in the United States.
Snow Telemetry (SNOTEL) Data & Products
The Natural Resources Conservation Service (NRCS) installs, operates, and maintains an extensive, automated system to collect snowpack and related climatic data in the Western United States called SNOTEL (for SNOwpack TELemetry). All data are received by the SNOTEL central computer, which in turn is linked to the Centralized Forecasting System (CFS) in the NWCC where data can be accessed via the NWCC homepage.
NOAA Digital Coast
This website provides data required by coastal resource management professionals, as well as the tools, training, and information needed to turn these data into useful information. Includes navigation charts of the U.S. shoreline and the Great Lakes.
Web Soil Survey
Web Soil Survey (WSS) provides soil data and information produced by the National Cooperative Soil Survey. It is operated by the USDA Natural Resources Conservation Service (NRCS) and provides access to the largest natural resource information system in the world.