Geographic Information Systems (GIS) and spatial data

Historical maps and charts from around the United States provided by NOAA.

Weather maps provided by the U.S. National Oceanic and Atmospheric Administration from 1871- present.

A web-based data repository with information on many data themes, such as education, climate, finance, and more.

Access to Sanborn maps for all fifty states, large-scale plans containing data that can help estimate the potential risk for urban structures.

Aggregate data from cities across the United States.

Varying categories of open data provided by the U.S. National Park Service.

Geospatial environmental data provided by the U.S. Environmental Protection Agency.

Geospatial public health data provided by the CDC.

A search and download tool for global, regional, and local geographic data and georeferenced scanned paper maps.

Fire Insurance Maps online (FIMo) is a research portal to find and view high-definition fire insurance maps, real estate atlases, plat books, and other historical maps. These resources detail building structures, building construction details, property ownership, property uses, and other useful information.

Digitized maps from the Lilly Library.

Librarians at MIT have put together a list of GIS Data sources for each state.

The National Historical Geographic Information System has boundary files for the U.S. dating back to 1790.

Geospatial data for wetlands in the United States provided by the U.S. Fish and Wildlife Service.

Updated nautical charts for the United States.

Open Topography facilitates community access to high-resolution, Earth science-oriented, topography data, and related tools and resources.

boundaries, roads, address, and more from the Census Bureau

Database for Humanities and Social Sciences

Housing survey shapefiles for metropolitan areas in the U.S.

These small-scale datasets originally developed and offered through the National Atlas are considered a part of the National Map framework datasets.

The Protected Areas Database of the United States (PAD-US) is the official inventory of protected open space in the United States. With over 715 million acres in thousands of holdings, the spatial data in PAD-US include public lands held in trust by national, State, and some local governments, and by some nonprofit conservation organizations.

Download georeferenced historical topographic maps for the U.S.

Web-based mapping application that lets users create professional-quality thematic maps and reports using demographic, business, and marketing data. PLEASE NOTE: Users may "sign in as guest," or register for an individual account if they would like to save their work.

Provides access to data maps, profile reports, demographic data, and data elements and variables. Includes interactive tools that allow users to create and share maps, presentations and tables, or compare and analyze data.