| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| usgs historical topographic maps | 1.77 | 0.4 | 854 | 82 | 32 |
| usgs | 1.14 | 0.4 | 4086 | 32 | 4 |
| historical | 1.84 | 0.5 | 9450 | 67 | 10 |
| topographic | 0.78 | 0.7 | 7734 | 25 | 11 |
| maps | 1.56 | 0.3 | 1106 | 41 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| usgs historical topographic maps | 0.36 | 0.4 | 3013 | 72 |
| usgs historical topographic maps viewer | 1.11 | 0.9 | 3111 | 5 |
| usgs historical topographic map explorer | 1.55 | 0.9 | 5427 | 37 |
| usgs historical topographic map collection | 0.35 | 0.1 | 7352 | 31 |
| usgs historical topographic map explorer tool | 0.57 | 0.9 | 1679 | 35 |
| usgs maps topographic maps | 0.24 | 0.3 | 9705 | 41 |
| historic usgs topo maps online | 0.95 | 0.5 | 1109 | 41 |
| usgs historic topo maps download | 0.12 | 0.4 | 8455 | 8 |
| usgs historic topo map viewer | 0.34 | 0.2 | 8956 | 77 |
| usgs topographic maps viewer | 0.89 | 0.3 | 5700 | 54 |
| usgs historical topo viewer | 1.77 | 0.7 | 9797 | 55 |
| usgs historical map viewer | 1.91 | 0.7 | 7921 | 19 |
| usgs historical topo maps | 0.8 | 0.9 | 1869 | 80 |
| usgs historical topo maps free | 0.14 | 0.5 | 4493 | 67 |
| usgs historic map viewer | 0.4 | 1 | 9524 | 36 |
| usgs historic topo viewer | 0.4 | 0.2 | 1347 | 55 |
| usgs historical topographical map explorer | 0.13 | 0.8 | 746 | 27 |
| usgs topo historic maps | 0.87 | 0.3 | 2333 | 25 |
