| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| usgs historic aerial maps | 2 | 0.5 | 9850 | 69 | 25 |
| usgs | 0.93 | 0.2 | 2191 | 81 | 4 |
| historic | 1.16 | 0.5 | 1403 | 66 | 8 |
| aerial | 1.95 | 0.9 | 3074 | 2 | 6 |
| maps | 0.16 | 0.1 | 1187 | 82 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| usgs historic aerial maps | 1.27 | 0.1 | 8020 | 48 |
