Function buildImageSourceSpec

buildImageSourceSpec(
    definition: BasemapDefinition,
    sourceId: string,
    layerId: string,
):
    | {
        sourceSpec: Record<string, unknown>;
        layerSpec: Record<string, unknown>;
    }
    | null
Builds a MapLibre image source spec and raster layer spec from a basemap definition. Pure factory — does not call any map API.
Parameters
- definition: BasemapDefinition
  Basemap config with imageSource.url and imageSource.coordinates.
- sourceId: string
  Source ID to use.
- layerId: string
  Layer ID to use.
Returns
    | {
        sourceSpec: Record<string, unknown>;
        layerSpec: Record<string, unknown>;
    }
    | null
Source and layer specs, or null if the definition is invalid.
- Defined in src/kernel/basemaps/image-source.ts:66