Johnson County, GA |
Year | Have | Index | Scale | Imagery | Agency | Codes |
| 1937 | none | 10 | (20) | --- | ASCS | KO | |
| 1940/41 | most |
3 | 20 | BW/P | ASCS | KO | |
| 1949 | none | 3 | (20) | --- | ASCS | KO | |
| 1954 | part |
3 | 10 | BW/P | ASCS | KO | |
| 1958 | all |
3 | 20 | BW/P |
ASCS | KO | |
| 1963 | all |
3 | 20 | BW/P | ASCS | KO | |
| 1969/70 | all |
3 | 20 | BW/P | ASCS | KO | |
| 1970 | most | 1 | 19 | BW/P | USGS | VCLB | |
| 1973 | most |
9 | 19 | BW/P | USGS | VDFH | |
| 1974 | most | 1 | 21 | BW/P | USGS | SWHN | |
| 1977 | all |
3 | 40 | BW/F | ASCS | 13167 | |
| 1981/82 |
all |
1 |
60 |
BW/P |
USGS |
NHAP80F |
|
| 1988 | all | 46 | 40 | BW/P | USGS | none | |
| 1993 |
all |
1 |
40 |
BW/P |
USGS |
none |