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
| U: Undersea | ||
| Code | Short Description | Full Description |
|---|---|---|
| CRSU | Continental rise | A gentle slope rising from oceanic depths towards the foot of a continental slope |
| DEPU | Deep | A localized deep area within the confines of a larger feature, such as a trough, basin or trench |
| EDGU | Shelf edge | A line along which there is a marked increase of slope at the outer margin of a continental shelf or island shelf |
| ESCU | Escarpment (or scarp) | An elongated and comparatively steep slope separating flat or gently sloping areas |
| FANU | Fan | A relatively smooth feature normally sloping away from the lower termination of a canyon or canyon system |
| FLTU | Flat | A small level or nearly level area |
| FRZU | Fracture zone | An extensive linear zone of irregular topography of the sea floor, characterized by steep-sided or asymmetrical ridges, troughs, or escarpments |
| FURU | Furrow | A closed, linear, narrow, shallow depression |
| GAPU | Gap | A narrow break in a ridge or rise |
| GLYU | Gully | A small valley-like feature |