EXECUTOR_TYPE_GEOSERVER_WMS
EXECUTOR_TYPE_GEOSERVER_WMS_CACHE
EXECUTOR_TYPE_TIANDITU
EXECUTOR_TYPE_OSM
EXECUTOR_TYPE_GOOGLEMAP
EXECUTOR_TYPE_GOOGLESTSTELLITE
EXECUTOR_TYPE_GOOGLETERRAIN
EXECUTOR_TYPE_MAPABC
EXECUTOR_TYPE_GEOSERVER_WMS_NOTILE
EXECUTOR_TYPE_BINGMAP
EXECUTOR_TYPE_TIANDITUSATELLITE