USGS 1:100 000 Topo! Maps
This page provides links to the FTP directory containing county-wide, seamless, and hill-shaded mosaics of USGS 1:100,000 topographic maps. These have been created using National Geographic's TOPO!™ and TOPO! GIS extension along with the MrSID™ compression software at the Geographic Resources Center (GRC). This production has been made possible through a special license agreement with National Geographic Maps and Wildflower Productions as part of an augmentation to the Lewis and Clark Historic Landscape Project conducted at the GRC in cooperation with the Office of the Missouri Secretary of State and the Missouri State Archives.
Click HERE to view a sample clipped from the Boone County mosaic
These are not USGS DRG (digital raster graphic) files and should not be confused with such although they do depict the same data. In many cases, the maps used for these mosaics are newer updates than those provided in the DRG file directory on the Missouri Spatial Data Information Service (MSDIS) ftp site. The image resolution for these files is 15 meters.
Select the county you want from the drop down menu. Alternatively you can select it from the clickable county map of Missouri.
NOTE: The three files required to correctly georeference the TOPO maps are zipped together into one file for faster download and you will need to unzip it. Please see the GZIP Help Page if you are having trouble.
| Map mosaics created with TOPO!™ |  |
| GIS work in Arc 8.1 GRID |
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| Image compression with MrSID™ |  |