[ CCode ( cname = "CHAMPLAIN_MAP_SOURCE_OAM" ) ]
[ Version ( deprecated = true ) ]
public const string MAP_SOURCE_OAM
Warning: MAP_SOURCE_OAM is deprecated.
OpenAerialMap
OpenAerialMap isn't available any more and will be removed in the next release.
As it doens't exist, it isn't registered to the factory and the 'create' method won't return any source.