| Survey type | M-D (magnetic; collected in digital form) |
|---|---|
| Flown by | Diversified Technical Services, Inc. |
| Date flown | 04/81 |
| Line spacing | 4.8 (km) |
| Altitude | 548.6 (m) by barometer measurement |
| Total distance | 2,341 (km) |
| References | |
| Counties | Bureau - Carroll - Henry - Jo Daviess - Lee - Ogle - Rock Island - Stephenson - Whiteside - Winnebago - Clinton - Dubuque - Jackson - Scott - Grant - Green - Lafayette - Rock |
| Overlapping surveys |
| Metadata | Questions & Answers - Outline - Parseable text - XML |
|---|---|
| Download | IL_4040.zip |
