Table 1 Comparison of positional errorsa (in meter) of addresses located by two automatic geocoding methods
Method of geocoding | Level of accuracy (accuracy code) | N addresses (%) | Median distance to the reference method location (IQR) in meters | Min-max, in meters | Distance in meters, N adresses (%) | |||||
|---|---|---|---|---|---|---|---|---|---|---|
[0–25] | [26–50] | [51–100] | [101–400] | [401–800] | >800 | |||||
Method Ab (Batch Geocoder) | Not found (0) | 8 (0.4) | 5919.5 (815.4–5639076.5) | 117.7–5679417.1 | – | – | – | 2 (25.0) | – | 6 (75.0) |
City (4) or Postal code (5) | 405 (18.2) | 108.2 (0.0–787.3) | 0.0–35204.7 | 160 (39.5) | 13 (3.2) | 26 (6.4) | 60 (14.8) | 48 (11.9) | 98 (24.2) | |
Street segment (6) | 363 (16.3) | 0.0 (0.0–108.1) | 0.0–519630.8 | 226 (62.3) | 18 (5.0) | 25 (6.9) | 41 (11.3) | 10 (2.8) | 43 (11.8) | |
Address (8) or Point of interest (9) | 1448 (65.1) | 0.0 (0.0–0.0) | 0.0–292249.4 | 1241 (85.7) | 58 (4.0) | 66 (4.6) | 56 (3.9) | 7 (0.5) | 20 (1.4) | |
Total | 2224 (100.0) | 0.0 (0.0–37.2) | 0.0–5679417.1 | 1627 (73.2) | 89 (4.0) | 117 (5.3) | 159 (7.1) | 65 (2.9) | 167 (7.5) | |
Method B (ArcGis Locator) | Postal code (6) or Town Hall (5) | 377 (15.5) | 788.9 (114.0–1845.1) | 0.3–8545.1 | 53 (14.1) | 11 (2.9) | 25 (6.6) | 44 (11.7) | 56 (14.9) | 188 (49.9) |
Locality (4) or Street segment (3) | 558 (23.0) | 110.3 (26.7–320.6) | 0.0–14477.6 | 132 (23.7) | 55 (9.9) | 82 (14.7) | 174 (31.2) | 47 (8.4) | 68 (12.2) | |
Interpolated address (2) or Address (1) | 1490 (61.4) | 12.5 (6.0–35.6) | 0.0–3951.9 | 1000 (67.1) | 237 (15.9) | 133 (8.9) | 100 (6.7) | 5 (0.3) | 15 (1.0) | |
Total | 2425 (100.0) | 26.5 (8.0–134.8) | 0.0–14477.6 | 1185 (48.9) | 303 (12.5) | 240 (9.9) | 318 (13.1) | 108 (4.5) | 271 (11.2) | |