Gilmer County, GA |
Year | Have | Index | Scale | Imagery | Agency | Codes |
| 1938/39 | none | 14 | (20) | --- | SCS | BUR | |
| 1950 | few | 1 | 20 | BW/P | ASCS | BUR | |
| 1963 | P/most | 4 | 20 | BW/P | ASCS | BUR | |
| 1963 | P/few | 4 | 8 | BW/P | ASCS | BUR | |
| 1971 | P/most | 3 | 20 | BW/P | ASCS | BUR | |
| 1971 | P/few | 3 | 8 | BW/P | ASCS | BUR | |
| 1975 | most | 5 | 29 | BW/P | TVA | BlueRidge | |
| 1980/81 | all | 4 | 40 | BW/P | ASCS | 13123 | |
| 1980/81 | few | 4 | 8 | BW/P | ASCS | 13123 | |
| 1988 | all | 46 | 40 | BW/P | USGS | none |