| Survey type | M-Dz (magnetic; digitized from contour maps) |
|---|---|
| Flown by | U.S. Geological Survey |
| Date flown | 09/74-10/74 |
| Line spacing | 1.6 (km) |
| Altitude | 2438 (m) by barometer measurement |
| Total distance | 5,632 (km) |
| References | |
| Counties | Clark - Cowlitz - Lewis - Skamania |
| Overlapping surveys |
| Metadata | Questions & Answers - Outline - Parseable text - XML |
|---|---|
| Download | WA2218.zip |
