CreateCOGOStraightLineByClockwiseDeflectionAngle Method

In This Topic

Creates a straight COGOLine for use in a Traverse. The line is specified using an angle relative to a previous course and a distance.

Syntax

Visual Basic (Declaration)
C#

Public Shared Function CreateCOGOStraightLineByClockwiseDeflectionAngle( _
   ByVal angle As Double, _
   ByVal fromBacksight As Boolean, _
   ByVal distance As Double _
) As COGOLine

public static COGOLine CreateCOGOStraightLineByClockwiseDeflectionAngle( 
   double angle,
   bool fromBacksight,
   double distance
)

Parameters

angle: An angle deflection value in decimal degrees.
fromBacksight: Is the angle deflection based off a backsight.
distance: Distance value.

Return Value

A COGOLine

Exceptions

Exception	Description
System.ArgumentException	angle cannot be NaN.
System.ArgumentException	distance cannot be NaN or 0.

Example

Create a COGOLine defined by deflection angle and distance

// Clockwise deflection angle 90 degrees, 50.00
var deflectionLine = COGOLineBuilder.CreateCOGOStraightLineByClockwiseDeflectionAngle(90.0, false, 50.00);

//Clockwise backsight deflection angle 270 degrees, 50.00'
var backSightDeflectionLine = COGOLineBuilder.CreateCOGOStraightLineByClockwiseDeflectionAngle(270.0, true, 50.00);

Create a Traverse

List<COGOLine> lstCOGOLines = new();
var direction = ParcelUtilities.Instance.ConvertQuadrantBearingDMSToNorthAzimuthDecDeg("S7-46-51-E");
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOStraightLine(nAzDirection, 61.45)); //1
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOStraightLine(166.2625, 37.22));//2
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOStraightLine(255.2833333, 71.4));//3
var circArcDef = new CircularArcDefinition
{
  Radius = -201.0,
  ArcLength = 45.29,
  ChordDirection = ParcelUtilities.Instance.ConvertQuadrantBearingDMSToNorthAzimuthDecDeg("N21-47-57W")
};
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOCircularArc(circArcDef));//4
var tangentCurveDef = new TangentCurveDefinition
{
  Radius = 169.0,
  ArcLength = 52.40
};
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOCircularArc(tangentCurveDef));//5

tangentCurveDef = new TangentCurveDefinition
{
  Radius = 13.0,
  ArcLength = 22.98
};
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOCircularArc(tangentCurveDef));//6

tangentCurveDef = new TangentCurveDefinition
{
  Radius = -281.0,
  ArcLength = 73.68
};
lstCOGOLines.Add(COGOLineBuilder.CreateCOGOCircularArc(tangentCurveDef));//7

var spatialReference = map?.SpatialReference;
var travParcel = new Traverse(spatialReference);
await travParcel.AddCoursesAsync(lstCOGOLines);
if (travParcel.IsValid())
{
  ; //insert code to use the traverse
}

Requirements

Target Platforms: Windows 11 Home, Pro, Enterprise (64 bit)

ArcGIS Pro version: 3.7 or higher.

Reference

COGOLineBuilder Class
COGOLineBuilder Members

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