Less than zero.

The terrain warning is turned off completely.The terrain warning can also be turned off by setting View.TerrainWarningOverlay to null.

Zero.

The terrain warning is applied to the entire view.

Greater than zero.

The maximum distance, in meters, from the aircraft position at which the terrain warning is displayed. The final calculations are performed in pixel coordinates on the graphics card so the resulting area will only approximate a geographic circle.

Less than zero.

The terrain warning is turned off completely.The terrain warning can also be turned off by setting View::terrainWarningOverlay to null.

Zero.

The terrain warning is applied to the entire view.

Greater than zero.

The maximum distance, in meters, from the aircraft position at which the terrain warning is displayed. The final calculations are performed in pixel coordinates on the graphics card so the resulting area will only approximate a geographic circle.

Less than zero.

The terrain warning is turned off completely.The terrain warning can also be turned off by setting View.terrainWarningOverlay to null.

Zero.

The terrain warning is applied to the entire view.

Greater than zero.

The maximum distance, in meters, from the aircraft position at which the terrain warning is displayed. The final calculations are performed in pixel coordinates on the graphics card so the resulting area will only approximate a geographic circle.

Less than zero.

The terrain warning is turned off completely.The terrain warning can also be turned off by setting View.terrainWarningOverlay to null.

Zero.

The terrain warning is applied to the entire view.

Greater than zero.

The maximum distance, in meters, from the aircraft position at which the terrain warning is displayed. The final calculations are performed in pixel coordinates on the graphics card so the resulting area will only approximate a geographic circle.