Create layers.json

Contains the list of layers in Locate, along with their layerIds, layerKeys, links to their datasources, and additional metadata.

{
  layerId: /* A globally unique ID used to refer to this layer */
  layerKey: /* The layer key - For the GMaps JS Lib. Not unique. */
  name: /* The layer name */
  description: /* The layer description */
  bbox: /* An array of four numbers (west, south, east, north) which define the rectangular bounding box covered by the layer as latitude and longitude in decimal degrees */
  datasourceType: /* The type of layer - one of "table" or "image" */
  datasources: /* The path to the GME API resource of the more specific version of this asset. Used for querying features and only applies to datasourceType "image". */
}