| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| usgs historic topographic maps | 0.06 | 0.4 | 4467 | 94 | 30 |
| usgs | 0.13 | 0.6 | 5539 | 65 | 4 |
| historic | 0.1 | 1 | 6144 | 10 | 8 |
| topographic | 0.56 | 0.2 | 1717 | 42 | 11 |
| maps | 0.84 | 0.8 | 3827 | 68 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| usgs historic topographic maps | 1.09 | 0.3 | 1458 | 70 |
| usgs historical topographic maps viewer | 1.98 | 0.2 | 7933 | 98 |
| usgs historical topographic map explorer | 1.08 | 0.8 | 5398 | 66 |
| usgs historical topographic map collection | 0.76 | 0.5 | 7997 | 47 |
| usgs historical topographic map explorer tool | 1.65 | 0.8 | 6551 | 75 |
| usgs topographic maps viewer | 0.16 | 0.3 | 9208 | 97 |
| usgs historical topo viewer | 0.47 | 0.7 | 581 | 34 |
| usgs historical map viewer | 1.81 | 0.5 | 451 | 13 |
| usgs historical topo maps | 1.5 | 0.7 | 904 | 61 |
| usgs historical topo maps free | 1.9 | 0.1 | 3191 | 20 |
| usgs historic map viewer | 1.43 | 0.6 | 1631 | 15 |
| usgs historic topo viewer | 1.83 | 0.9 | 4185 | 86 |
| usgs historical topographical map explorer | 0.23 | 0.4 | 4366 | 4 |
| usgs topo historic maps | 1.62 | 0.8 | 2027 | 41 |
| usgs historic topo maps download | 1.63 | 0.9 | 3019 | 25 |
