Table 3 Validity of GigaPan® and Google Earth technology in comparison to direct observation for all public amenity categories for street segments in Pittsburgh, PA
From: Validity of environmental audits using GigaPan® and Google Earth Technology
Variable | N | Prevalencea | GigaPan® versus direct observation | Google Earth versus direct observation | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
Sensitivity | 95% CI | Specificity | 95% CI | Sensitivity | 95% CI | Specificity | 95% CI | |||
Garden, flowers, or planter | 461 | 15.6 | 34.7 | (23.9, 46.9) | 80.5 | (76.2, 84.3) | 65.3 | (53.1, 76.1) | 73.3 | (68.6, 77.6) |
Public trash can | 460 | 14.8 | 47.1 | (34.8, 59.6) | 96.7 | (94.4, 98.2) | 67.6 | (55.2, 78.5) | 94.1 | (91.3, 96.2) |
Bus stop | 459 | 22.0 | 59.4 | (49.2, 69.1) | 96.9 | (94.6, 98.5) | 70.3 | (60.4, 79) | 95.8 | (93.2, 97.6) |
Bench/shelter at transit | 462 | 2.8 | 61.5 | (31.6, 86.1) | 98.9 | (97.4, 99.6) | 61.5 | (31.6, 86.1) | 99.3 | (98.1, 99.9) |
Benches or other seating | 460 | 1.3 | 0.0 | (0, 45.9) | 99.6 | (98.4, 99.9) | 16.7 | (0.4, 64.1) | 98.7 | (97.1, 99.5) |
Bicycle Parking | 460 | 0.7 | 0.0 | (0, 70.8) | 99.3 | (98.1, 99.9) | 33.3 | (0.8, 90.6) | 98.9 | (97.5, 99.6) |
Amount street trees | 463 | 32.8 | 61.8 | (53.6, 69.6) | 83.3 | (78.7, 87.3) | 69.7 | (61.8, 76.9) | 79.7 | (74.8, 84.1) |
Trees shading sidewalk | 461 | 25.2 | 41.4 | (32.3, 50.9) | 89.0 | (85.2, 92.1) | 56.0 | (46.5, 65.2) | 89.3 | (85.5, 92.3) |