The GeoView Server REST API catalogs namespace provides functions for acquiring lists of supported values related to spatial reference system, background maps, file formats, and more:
HTTP GET http://api.geoview.be/geoservice/v1/catalogs/srs
HTTP GET http://api.geoview.be/geoservice/v1/catalogs/srs/<id>
HTTP GET http://api.geoview.be/geoservice/v1/catalogs/cameras
HTTP GET http://api.geoview.be/geoservice/v1/catalogs/cameras/<id>
HTTP GET http://api.geoview.be/geoservice/v1/catalogs/cameras/query
HTTP GET http://api.geoview.be/geoservice/v1/catalogs/formats/vector
HTTP GET http://api.geoview.be/geoservice/v1/catalogs/formats/raster
HTTP GET http://api.geoview.be/geoservice/v1/catalogs/maps
HTTP GET http://api.geoview.be/geoservice/v1/catalogs/messages