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 |
|---|---|---|
| MTU | Mountain | A well-delineated subdivision of a large and complex positive feature |
| PKSU | Peaks | Prominent elevations, part of a larger feature, either pointed or of very limited extent across the summit |
| PKU | Peak | A prominent elevation, part of a larger feature, either pointed or of very limited extent across the summit |
| PLNU | Plain | A flat, gently sloping or nearly level region |
| PLTU | Plateau | A comparatively flat-topped feature of considerable extent, dropping off abruptly on one or more sides |
| PNLU | Pinnacle | A high tower or spire-shaped pillar of rock or coral, alone or cresting a summit |
| PRVU | Province | A region identifiable by a group of similar physiographic features whose characteristics are markedly in contrast with surrounding areas |
| RDGU | Ridge | A long narrow elevation with steep sides |
| RDSU | Ridges | Long narrow elevations with steep sides |
| RFSU | Reefs | Surface-navigation hazards composed of consolidated material |