Atlas Effort Summary Results
| Effort Statistic | Atlas I (1987–1995) | Atlas II (2007–2012) |
| # of field workers | 1,170 | 785 |
| Total person-hours | 73,486 | 54,773 |
| Priority block person-hours | 68,057 | 49,014 |
| Mean # person-hours/priority block * | 38.6 | 28.1 |
| Priority block party-hours | 38,289 | 35,853 |
| Mean # party-hours/priority block * | 21.7 | 20.5 |
| Total mileage | 649,433 | 596,794 |
| Total # records | 86,499 | 195,121 |
| # records (highest evidence/species/block) | 86,499 | 98,752 |
| # priority block records | 71,433 | 163,686 |
| Total blocks with data | 2,696 | 4,507 |
| # priority blocks with data | 1,761 | 1,745 |
| # priority blocks completed | 1,650 | 1,632 |
* - Excludes priority blocks with no data.