(data may be up to 20 years older)
US Defense Mapping Agency
|
ESRI Digital Chart of the World |
|---|---|
| (c)1992 (data may be up to 20 years older) |
Accuracy < 1000 metres |
| Attributes | type = perennial or non-perennial |
| Sources | Environmental Systems Research Institute, Inc. (ESRI)
US Defense Mapping Agency |
Example of river coverage resolution