The LandScope America preview includes a tallgrass prairie map of the United States that shows the original area of the tallgrass prairies (before European settlement in the 1800’s) and the major known tallgrass prairie areas remaining.
The web site says: "Welcome to LandScope America, an exciting new online conservation resource. Planned for release in late 2008, this interactive website will bring together maps, data and stories about natural places and present them in highly dynamic and accessible formats. We hope the result will both inform and inspire conservation of America’s incomparable lands and waters. … LandScope America — a collaborative project of NatureServe and the National Geographic Society — is a new online resource for the land-protection community and the public."