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 |
|---|---|---|
| APNU | Apron | A gentle slope, with a generally smooth surface, particularly found around groups of islands and seamounts |
| ARCU | Arch | A low bulge around the southeastern end of the island of Hawaii |
| ARRU | Arrugado | An area of subdued corrugations off Baja California |
| BDLU | Borderland | A region adjacent to a continent, normally occupied by or bordering a shelf, that is highly irregular with depths well in excess of those typical of a shelf |
| BKSU | Banks | Elevations, typically located on a shelf, over which the depth of water is relatively shallow but sufficient for safe surface navigation |
| BNKU | Bank | An elevation, typically located on a shelf, over which the depth of water is relatively shallow but sufficient for safe surface navigation |
| BSNU | Basin | A depression more or less equidimensional in plan and of variable extent |
| CDAU | Cordillera | An entire mountain system including the subordinate ranges, interior plateaus, and basins |
| CNSU | Canyons | Relatively narrow, deep depressions with steep sides, the bottom of which generally has a continuous slope |
| CNYU | Canyon | A relatively narrow, deep depression with steep sides, the bottom of which generally has a continuous slope |