The U.S. Geological Survey provides geochemical and mineralogical maps for the conterminous United States, based on sampling data with a spatial resolution of 1 sample per 1,600 square km, for a total of 4857 sites across the country. The resulting interactive maps allow users to see regional variations in soil chemistry at different depths in the soil.
The University of New Hampshire, in collaboration with the New Hampshire Office of Energy and Planning, maintains the GRANITView application. This application makes a large amount of environmental and other geoscientific information available in interactive map form, including:
The Massachusetts Office of Geographic Information's "OLIVER" Online Mapping Tool provides a huge amount of information on Massachusetts' geology, natural resources, and hazards in interactive map form, including: