Table 8.
Summary of distribution of distances (m) to closest bus stop undertaking using official PSMA road network and a preliminary OpenStreetMap-derived network and that used in the final analysis, as well as the difference in results using these (pooling exclusions for missing records for fair comparison of shared distributions).
| Pedestrian network comparison analysis | N (excludes missing) | Missing | Percentile | Mean | SD | ||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | 25 | 50 | 75 | 99 | |||||
| Distance to closest bus stop (2012); distances exclude nulls for both datasets (i.e.the combined missing) | |||||||||
| PSMA network (reference) | 1,716,150 | 2,083 | 8 | 187 | 331 | 550 | 3,025 | 490 | 745 |
| OpenStreetMap-derived (June 2018) | 1,716,150 | 40 | 10 | 187 | 326 | 536 | 2,871 | 479 | 738 |
| Difference (PSMA – OpenStreetMap) | 1,716,150 | 2,121 | −348 | −3 | 1 | 8 | 503 | 11 | 168 |
| Distance to closest bus stop (2012 vs 2018); distances exclude nulls for both datasets and exclusions described in Table 8) | |||||||||
| PSMA network (reference) | 1,711,880 | 2,083 | 8 | 187 | 331 | 549 | 3024 | 490 | 745 |
| OpenStreetMap-derived (October 2018) | 1,711,880 | 4,322 | 10 | 184 | 317 | 504 | 1,980 | 423 | 582 |
| Difference (PSMA – OpenStreetMap) | 1,711,863 | 6,408 | −494 | −4 | 1 | 13 | 1,790 | 66 | 530 |
| Distance to closest bus stop (2012); distances exclude null for both datasets, and exclusions described in Table 8) | |||||||||
| PSMA network (reference) | 1,711,863 | 2,083 | 8 | 187 | 331 | 549 | 3,024 | 490 | 745 |
| OpenStreetMap-derived (June 2018) | 1,711,863 | 40 | 10 | 187 | 326 | 536 | 2,858 | 479 | 738 |
| Difference (PSMA – OpenStreetMap) | 1,711,863 | 6,425 | −344 | −3 | 1 | 8 | 499 | 11 | 167 |