NRIS is a service of the Montana State Library designed to make information on Montana's natural resources easily and readily accessible. This information includes numerous mapping and data resources. Serving government agencies, business and industry, and private citizens, NRIS operates a clearinghouse and referral service to link users with the best sources of information and service.
A commercial site that provides access to topographic maps, nautical charts as well as aerial photos, called NavPhotos, which cover coastal regions exclusively. This site allows the user to search for maps by place name and state. Multiple map scales are available. Maps print well and there is an email option.