This map is a mosaic of several historical and modern maps of the area along the Lewis and Clark Expedition route: the 1814 original expedition map covering the route itself, then just beyond it the US GLO maps from 1866-79, then the US National Atlas maps from 1970, and finally the entire map is bordered with current satellite imagery of the US West. In this 3D GIS version of the map, the scanned historic map image is combined with the modern day USGS DEM (Digital Elevation Model), allowing us to "warp" the historic map images into 3D.

The flash movie below gives a preview of the 3D GIS experience. Click on the link below the flash movie to launch the full 3D Lewis and Clark GIS Viewer, but READ this first - the 3D GIS Viewer has three viewing modes: Fly Through (opening mode), Inspection, and Hover. Use the space bar to toggle between them. Use your mouse and arrow keys for Fly-Through, arrow keys and page up/down for Inspection, and arrow keys and "1" key (down) and "2" key (up) for Hover. Using keys together will produce different motions. Detailed Help is available.

Launch 3D Lewis & Clark Viewer Small Screen (7.29 MB) (If video card is 8MB)