All places in the Places API are categorized into one out of 9 feature classes (represented by letters) and further subcategorized into one out of 684 feature codes.
Feature Codes
| R: Road, railroad | ||
| Code | Short Description | Full Description |
|---|---|---|
| RR | Railroad | A permanent twin steel-rail track on which freight and passenger cars move long distances |
| RRQ | Abandoned railroad | |
| RTE | Caravan route | The route taken by caravans |
| RYD | Railroad yard | A system of tracks used for the making up of trains, and switching and storing freight cars |
| ST | Street | A paved urban thoroughfare |
| STKR | Stock route | A route taken by livestock herds |
| TNL | Tunnel | A subterranean passageway for transportation |
| TNLN | Natural tunnel | A cave that is open at both ends |
| TNLRD | Road tunnel | A tunnel through which a road passes |
| TNLRR | Railroad tunnel | A tunnel through which a railroad passes |