Table 2.
Actual costs of traditional ground-truthing compared with estimated costs of modified ground-truthing
| Traditional ground-truthing (actual) | Modified ground-truthing (estimated)b | Savingsb | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Site | Site | |||||||||
| A | B | C | Total | A | B | C | Total | Amount | % | |
| Mileage | ||||||||||
| Miles of road within network | 80 | 236 | 248 | 564 | 10 | 32 | 25 | 66 | 498 miles | 88 % |
| Miles driven for ground-truthing | 100 | 262 | 356 | 718 | 12 | 40 | 31 | 83 | 635 miles | 88 % |
| Ground-truthing mileage costsa | $57 | $148 | $201 | 406 | $7 | $23 | $18 | 47 | $359 | 88 % |
| Miles driven to/from sites | 124 | 272 | 396 | 792 | 124 | 136 | 132 | 392 | 400 miles | 51 % |
| Total miles driven | 224 | 534 | 752 | 1510 | 136 | 168 | 157 | 460 | 1050 miles | 70 % |
| Total mileage costsa | $127 | $302 | $425 | 853 | $77 | $95 | $89 | 260 | $593 | 70 % |
| Time/staffing | ||||||||||
| Full day trips needed | 1 | 2 | 3 | 6 | 1 | 1 | 1 | 3 | 3 days | 50 % |
| Time spent ground-truthing (hr:min) | 4:30 | 13:14 | 15:39 | 33:38 | -- | -- | -- | -- | -- | -- |
| Average mph during ground truthing | 22.2 | 19.8 | 22.7 | 21.4 | -- | -- | -- | -- | -- | -- |
| Total hours of data collectionc | 15 | 40 | 59 | 114 | -- | -- | -- | -- | -- | -- |
aAssuming a mileage rate of $0.565
bNot all time/staffing and savings metrics could be estimated. Miles per hour within central commercial districts is likely lower than the miles per hour in all town/rural areas
cHours totaled for two data collectors