Function registerBaseLayer

registerBaseLayer(key: string, definition: BasemapDefinition): void
Registers one basemap definition under a key.

Registering does not activate: the basemap becomes selectable, and setBaseLayer applies it. Re-registering a key shallow-merges the new definition over the previous one.

A missing key or definition logs a warning and returns — this never throws.
Parameters
- key: string
  Identifier used by setBaseLayer and by the data-gl-baselayer controls.
- definition: BasemapDefinition
  The basemap definition (type, url, attribution…).
Returns void
Example
```
GeoLeaf.Baselayers.registerBaseLayer("mytiles", {
    id: "mytiles",
    label: "Mes tuiles",
    url: "https://tiles.example.com/{z}/{x}/{y}.png",
    attribution: "© Example Tiles",
    maxZoom: 20,
});
```
- Defined in packages/core/src/kernel/basemaps/registry.ts:211