get:
   tags:
     - Custom Projection CRS
   summary: Retrieve the list of custom CRS projection operation methods (including their associated parameters) and datums supported by this API.
   operationId: getCustomCRSProjections
   parameters:
     - $ref: '../../parameters/unspecified/f-metadata.yaml'
   responses:
     '200':
       $ref: '../../responses/maps-core/rProjections.yaml'
     '406':
       $ref: '../../responses/common-core/rNotAcceptable.yaml'
     '500':
       $ref: '../../responses/common-core/rServerError.yaml'
