| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| usgs historic topo maps | 0.5 | 0.4 | 1962 | 3 | 23 |
| usgs | 1.38 | 0.9 | 2238 | 92 | 4 |
| historic | 1.8 | 0.4 | 897 | 69 | 8 |
| topo | 0.57 | 0.8 | 3123 | 97 | 4 |
| maps | 0.23 | 0.6 | 8743 | 59 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| usgs historic topo maps | 0.42 | 0.1 | 8968 | 80 |
| usgs historic topo maps download | 1.51 | 0.5 | 4553 | 4 |
| usgs historical topo maps free | 0.54 | 0.4 | 1903 | 26 |
| usgs historical topo maps esri | 1.99 | 0.8 | 6445 | 74 |
| usgs historical topo maps arcgis online | 1.28 | 0.1 | 6719 | 42 |
| usgs historic topo map explorer | 1.49 | 0.6 | 8975 | 80 |
| usgs historic topo map viewer | 0.91 | 0.4 | 3618 | 16 |
| historic usgs topo maps online unh | 0.63 | 0.4 | 1727 | 59 |
| historic usgs topo maps online | 1.93 | 0.7 | 357 | 8 |
| unh historic usgs topo maps | 0.67 | 0.7 | 5762 | 80 |
