Enumeration Members
CURRENT_FEATURES
CURRENT_FEATURES: "CURRENT_FEATURES"
CURRENT_POS
CURRENT_POS: "CURRENT_POS"
DRAG_END
DRAG_END: "DRAG_END"
MAP_READY
MAP_READY: "MAP_READY"
ROLLOVER
ROLLOVER: "ROLLOVER"
SELECT_FEATURES
SELECT_FEATURES: "SELECT_FEATURES"
Event types for Map to App communication