LineOfSightParams Constructor(Polyline,Double,Double,Boolean,Boolean,Double,SpatialReference)

In This Topic

Constructor overload. Initialize a new instance of LineOfSightParams.

Syntax

C#
Visual Basic (Declaration)

public LineOfSightParams( 
   Polyline sightLine,
   double observerHeightOffset,
   double targetHeightOffset,
   bool applyCurvature,
   bool applyRefraction,
   double refractionFactor,
   SpatialReference outputSpatialReference
)

Public Function New( _
   ByVal sightLine As Polyline, _
   ByVal observerHeightOffset As Double, _
   ByVal targetHeightOffset As Double, _
   ByVal applyCurvature As Boolean, _
   ByVal applyRefraction As Boolean, _
   ByVal refractionFactor As Double, _
   ByVal outputSpatialReference As SpatialReference _
)

Parameters

sightLine: The sight line. The observer point is the first point in the line. The target point is the last point in the line.
observerHeightOffset: The observer height offset.
targetHeightOffset: The target height offset.
applyCurvature: Apply curvature.
applyRefraction: Apply refraction.
refractionFactor: Refraction factor.
outputSpatialReference: The output spatial reference.

Example

Get Line of Sight

var losParams = new LineOfSightParams();
losParams.ObserverPoint = observerPoint;
losParams.TargetPoint = targetPoint;

// add offsets if appropriate
// losParams.ObserverHeightOffset = observerOffset;
// losParams.TargetHeightOffset = targerOffset;

// set output spatial reference
losParams.OutputSpatialReference = MapView.Active.Map.SpatialReference;

LineOfSightResult results = null;
try
{
  if (tinLayer.CanGetLineOfSight(losParams))
    results = tinLayer.GetLineOfSight(losParams);
}
catch (Exception ex)
{
  // log exception message
}

if (results != null)
{
  bool targetIsVisibleFromObserverPoint = results.IsTargetVisibleFromObserverPoint;
  //These properties are not used. They will always be false
  // results.IsTargetVisibleFromVisibleLine;
  // results.IsTargetVisibleFromInvisibleLine;


  if (results.VisibleLine != null)
    MapView.Active.AddOverlay(results.VisibleLine, visibleLineSymbol.MakeSymbolReference());
  if (results.InvisibleLine != null)
    MapView.Active.AddOverlay(results.VisibleLine, invisibleLineSymbol.MakeSymbolReference());
  if (results.ObstructionPoint != null)
    MapView.Active.AddOverlay(results.ObstructionPoint, obstructionPointSymbol.MakeSymbolReference());
}

Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3.3 or higher.

Reference

LineOfSightParams Class
LineOfSightParams Members
Overload List

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