NgaDigitalTerrainElevationDataUnloadExtent Method

Unloads the cached terrain data for a given CartographicExtent. This method unloads all cached regions where any part of the region falls within the extent. It does not return until the regions have been unloaded. However, if a region within the extent is being used in another thread while this method is executing, the region may be reloaded immediately after this method unloads it. This method is safe to call from any thread.

public override void UnloadExtent(
	CartographicExtent extent
)

Public Overrides Sub UnloadExtent ( 
	extent As CartographicExtent
)

public:
virtual void UnloadExtent(
	CartographicExtent^ extent
) override

abstract UnloadExtent : 
        extent : CartographicExtent -> unit 
override UnloadExtent : 
        extent : CartographicExtent -> unit