Function layerGeometry

layerGeometry<T extends string | null = null>(
config: LayerGeometryShape | null | undefined,
fallback?: T,
): string | T
The geometry a layer configuration declares, whichever of the two aliases carries it.

⚠️ geometryType wins when both are present. They are aliases, so this only matters if a profile declares them with DIFFERENT values — measured on 07/08/2026: 0 of the 6 configs that declare both disagree. Should that ever change, the disagreement is a profile error and belongs to validate:profiles, not to a silent tie-break here.
Type Parameters
- T extends string | null = null
Parameters
- config: LayerGeometryShape | null | undefined
  A layer configuration, raw from disk or normalised by the profile loader.
- fallback: T = ...
  Returned when the config declares neither key. Defaults to null.
Returns string | T
The declared geometry (e.g. "point", "polygon"), or fallback.
Example
```
layerGeometry({ geometryType: "point" });              // "point"
layerGeometry({ geometry: "polygon" });                // "polygon"
layerGeometry({ geometry: "line" }, "point");          // "line"
layerGeometry({ label: "sans géométrie" });            // null
layerGeometry({ label: "sans géométrie" }, "polygon"); // "polygon"
```
- Defined in src/kernel/config/layer-geometry.ts:69