| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| historic iowa railroad map | 1.59 | 0.3 | 6928 | 25 | 26 |
| historic | 1.51 | 0.3 | 4491 | 17 | 8 |
| iowa | 1.08 | 0.8 | 2485 | 84 | 4 |
| railroad | 0.22 | 0.1 | 455 | 24 | 8 |
| map | 0.18 | 1 | 7325 | 78 | 3 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| historic iowa railroad map | 0.35 | 0.6 | 3604 | 90 |
| iowa railroad map 1880 | 0.89 | 0.4 | 2892 | 2 |
| state of iowa railroad maps | 1.82 | 0.3 | 6893 | 90 |
| iowa northern railroad map | 0.86 | 0.5 | 1026 | 92 |
| iowa interstate railroad map | 1.92 | 0.4 | 7082 | 14 |
| iowa central railroad map | 0.31 | 0.2 | 6613 | 81 |
| iowa interstate railroad system map | 1.89 | 0.7 | 1786 | 68 |
| history of railroads in iowa | 0.52 | 1 | 6427 | 34 |
| iowa northern railway map | 1.19 | 0.2 | 9717 | 99 |
| old railroads in iowa | 0.55 | 1 | 5766 | 8 |
| iowa dot railroad map | 1.79 | 0.1 | 903 | 13 |
| iowa pacific railroad map | 1.72 | 1 | 121 | 100 |
| list of railroads in iowa | 1.65 | 1 | 7890 | 11 |
| historical maps of iowa | 1.06 | 0.1 | 5648 | 58 |
| railroad museum in iowa | 1.89 | 0.1 | 4746 | 4 |
| iowa railroad historical society | 1.15 | 0.1 | 1909 | 63 |
