Generalized extracts of the U.S. Census Bureau's TIGER Line files for administrative and census areas.
"The National Biological Information Infrastructure (NBII) is a broad, collaborative program to provide increased access to data and information on the nation's biological resources. The NBII links diverse, high-quality biological databases, information products, and analytical tools maintained by NBII partners and other contributors in government agencies, academic institutions, non-government organizations, and private industry. NBII partners and collaborators also work on new standards, tools, and technologies that make it easier to find, integrate, and apply biological resources information. Resource managers, scientists, educators, and the general public use the NBII to answer a wide range of questions related to the management, use, or conservation of this nation's biological resources.
The NBII Program is managed by the U.S. Geological Survey's Biological Informatics Office." from web site
"The National Weather Service (NWS) provides weather, hydrologic, and climate forecasts and warnings for the United States, its territories, adjacent waters and ocean areas, for the protection of life and property and the enhancement of the national economy. NWS data and products form a national information database and infrastructure which can be used by other governmental agencies, the private sector, the public, and the global community." from web site
See Ohio Geological survey for maps, data sets, and more. See other divisions via the Ohio Department of Natural Resources Web Site
A very powerful open source geodatabase that anchors many geospatial projects, providing not only vector and tabular data store, but a customizable, programmable suite of spatial operations and functions.
SimplyMap is a web-based mapping application that lets users quickly create professional-quality thematic maps and reports using powerful demographic, business, and marketing data. SimplyMap turns complex data into valuable information that is easily accessed through an innovative and user-friendly interface.
TIGER stands for Topically Integrated Geographic Encoding and Referencing system, and provides shapefiles for use with GIS software.