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TerrainAlongLineComputeElevationAngleAboveTerrain Method (Cartographic, Cartographic, TerrainProvider)

Computes the angle from the line of sight between the target and observer positions and the direction to the point on terrain with the highest elevation angle. The angle is determined from the perspective of the position closest to the Shape. The DefaultMinimumTerrainHeight and DefaultMaximumTerrainHeight are used for the computation.

Namespace:  AGI.Foundation.Terrain
Assembly:  AGI.Foundation.TerrainAnalysis (in AGI.Foundation.TerrainAnalysis.dll) Version: 21.2.409.0 (21.2.409.0)
Syntax
public static double ComputeElevationAngleAboveTerrain(
	Cartographic observerPosition,
	Cartographic targetPosition,
	TerrainProvider terrainProvider
)

Parameters

observerPosition
Type: AGI.Foundation.CoordinatesCartographic
The planetodetic position of the observer object, expressed as a longitude, latitude, and altitude relative to the ellipsoid specified by the Shape property of the terrainProvider.
targetPosition
Type: AGI.Foundation.CoordinatesCartographic
The planetodetic position of the target object, expressed as a longitude, latitude, and altitude relative to the ellipsoid specified by the Shape property of the terrainProvider.
terrainProvider
Type: AGI.Foundation.TerrainTerrainProvider
The terrain provider describing the terrain that is potentially obscuring the path between the two objects.

Return Value

Type: Double
The angle from the line of sight between the target and observer positions and the direction to the point on terrain with the highest elevation angle. The angle is determined from the perspective of the position closest to the Shape. Positive numbers indicate that the line of sight between the objects is not obscured by terrain. Negative numbers indicate that it is obscured.
Exceptions
ExceptionCondition
ArgumentNullExceptionThrown if terrainProvider is .
See Also