Interchange 21, IL
Interactive topo map of Interchange 21, IL
| Place Name: | Interchange 21 |
| Feature Class: | Crossing |
| US State: | IL |
| County: | Madison |
| Latitude: | 38.76 |
| Longitude: | -89.8 |
| Elevation (meters): | 150 m |
| Elevation (feet): | 492′ |
| USGS Quad: | Marine topo map |
| 7.5´ topo: |  |
| State topo index: | IL topo index |
| Alternate map versions: | IL topographic maps Editions by year, direct download as GeoPDF. |
| 30´ x 60´ topo: | 1:100,000 scale map |
| 1° x 2° topo: | 1:250,000 scale map |