...
| Code Block |
|---|
{
"spatialReference": {
"wkid": 4326
},
"candidates": [
{
"address": "115 MAIN ST",
"location": {
"y": 37.79152826999239,
"x": -122.39400753158013
},
"score": 100,
"attributes": {
"base_address_num": 115,
"base_address_suffix": null,
"street_name": "MAIN",
"street_type": "ST",
"zipcode": "94105",
"parcels": [
{
"address_base_flg": true,
"blk_lot": "3717012",
"unit_num": null
},
{
"address_base_flg": true,
"blk_lot": "3717013",
"unit_num": null
}
],
"units": []
}
}
]
} |
Scoring
If everything matches perfectly, you should get a score of 100. If you misspell the street name by 1 letter you get a score of 98.
Results and Performance
Using this example file from Dept. of Public Health, we saw a rate of about 1000 addresses per minute with barely any load on the servers. The results on this same dataset are summarized in this table.
| score | percent |
|---|---|
| 88 | 0.02 |
| 90 | 0.10 |
| 94 | 6.28 |
| 96 | 2.89 |
| 98 | 90.29 |
Scoring
If everything matches perfectly, you should get a score of 100. If you misspell the streetname by 1 letter you get a score of 98.
The example file contains 4,725 rows with 908 unique addresses. 896 of these addresses (98.7%) were resolved. Where multiple addresses are returned, a reasonably good result can be expected from accepting the match with the highest score. Of the 896 addresses that were resolved, 863 (96%) returned a single result. 33 (3%) returned two addresses, and 2 (0.02%) returned three addresses. The result with the highest score was the correct candidate in all cases.
Of the remaining 12 addresses that were not resolved:
Two addresses failed due to irretrievable data-entry errors:
| 625 \ St |
| 1344 St |
Seven addresses were not in the enterprise address database:
| 509 MINNA St |
| 24 WENTWORTH St |
| 6 St. Louis Alley |
| 15 ROMOLO Pl |
| 3101 MISSION St |
| 752 SHOTWELL St |
| 2725 VAN NESS Ave |
Five listed extra information or multiple street numbers, and were resolved manually:
| 2358 2362 15th St | 2362 15th St |
| 2855 2857 2859 BUSH St | 2855 Bush St |
| 3354 3358 cesar chavez St | 3354 Cesar Chavez St |
| 654 GRANT Ave 2 | 654 Grant Ave |
| 3148 CESAR CHAVEZ BLDG#14 St | 3148 Cesar Chavez |
Client
Here is a working command line client.
...
The server code is here and here.
The tests are over here.
Invalid Address List
The following apparent errors in the EAS were discovered in the course of debugging and examining the results of this geocoder:
| Address | Error Description |
| 15 ROMOLO Pl | Not in EAS, although the parcel is mapped |
| 3148 CESAR CHAVEZ BLDG#14 St | Many addresses for one parcel |
| 752 SHOTWELL St | Not in EAS, although the parcel is mapped |
| 670 Natoma | Linked to two APNs, both of which are retired |
| 1443 Clayton St | Linked to many other addresses, probably erroneously |
| 1411 Mason St | Linked to an adjacent parcel, probably erroneously |
| Attachments |
|---|