| usgs agency use code | 1.8 | 0.8 | 7024 | 20 | 20 |
| usgs site type code | 1.77 | 0.1 | 4775 | 19 | 24 |
| usgs state and county codes | 1.01 | 0.6 | 1660 | 27 | 59 |
| usgs sample type code | 1.36 | 0.2 | 2004 | 21 | 57 |
| usgs method code list | 1.27 | 0.9 | 8729 | 21 | 76 |
| usgs g code sender | 1.16 | 0.3 | 4125 | 18 | 92 |
| usgs parameter code list | 0.97 | 0.8 | 3476 | 24 | 79 |
| usgs land use category | 0.83 | 1 | 4123 | 22 | 68 |
| code of conduct usgs | 1.83 | 0.2 | 5150 | 20 | 72 |
| us federal government agency codes | 0.93 | 0.9 | 4627 | 34 | 75 |
| usgs parameter code dictionary | 0.47 | 0.1 | 4150 | 30 | 36 |
| us code land use | 1.09 | 0.8 | 9095 | 16 | 84 |
| usgs land use data download | 1.01 | 0.4 | 2643 | 27 | 86 |
| usgs land use maps | 0.97 | 0.2 | 9432 | 18 | 10 |
| usgs data qual codes | 0.44 | 0.2 | 3290 | 20 | 49 |
| state land use codes | 1.06 | 0.5 | 6233 | 20 | 100 |
| usgs gov official website | 0.7 | 0.7 | 7509 | 25 | 90 |
| united states government codes | 1.12 | 0.5 | 59 | 30 | 5 |
| us government cage code search | 0.56 | 0.6 | 4314 | 30 | 98 |
| usgs by the numbers | 0.3 | 0.3 | 473 | 19 | 18 |
| usgs + site information | 1.21 | 1 | 4993 | 23 | 41 |
| united states state codes | 1.12 | 0.7 | 1796 | 25 | 66 |
