| Keyword | CPC | PCC | Volume | Length string | Score |
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| usgs maps download | 1.9 | 0.8 | 4060 | 18 | 43 |
| usgs maps download for free | 0.38 | 0.3 | 8424 | 27 | 93 |
| usgs topo maps free download | 1.62 | 0.8 | 9892 | 28 | 52 |
| download usgs topo maps | 1.94 | 0.2 | 8218 | 23 | 43 |
| usgs quadrangle maps download | 1.69 | 1 | 7827 | 29 | 4 |
| usgs quad maps to download free | 0.06 | 0.6 | 2711 | 31 | 30 |
| usgs topo maps free pdf download | 1.64 | 0.1 | 3022 | 32 | 38 |
| usgs contour maps download free | 0.68 | 0.6 | 8986 | 31 | 14 |
| usgs topographic maps free download | 0.36 | 0.8 | 9366 | 35 | 49 |
| usgs maps online free download | 0.57 | 0.7 | 2113 | 30 | 70 |
| access and download usgs quad maps for free | 1.54 | 0.3 | 1052 | 43 | 58 |
