topic Angle between two points in ArcGIS Pro SDK Questions

Angle between two points

mikeharol1 — Tue, 25 Aug 2015 14:06:11 GMT

What is best way to determine angle between two mappoints?

Re: Angle between two points

ThomasEmge — Tue, 25 Aug 2015 14:25:30 GMT

There are probably a number of approaches. I suggest using a LineBuilder to create a LineSegment using the two points as the start and the end point. The created segment in return contains an angle property.

https://pro.arcgis.com/en/pro-app/sdk/api-reference/#topic7741.html

Re: Angle between two points

JoeBorgione — Tue, 25 Aug 2015 16:24:51 GMT

Alternatively, you may take a look at the Near Tool as well as the Generate Near Table Tool. Each allow you to generate the angle.

Re: Angle between two points

mikeharol1 — Tue, 25 Aug 2015 18:24:14 GMT

so i think like the linesegment approach but it returns the angle relative to x axis going counter clockwise as opposed to the preferable gis coordinate system starting at y axis in a clockwise direction. so if the lineSegment.angle returns 30 degrees that would actually be 60 degrees on the compass. Is there a method or technique to make the conversion?

Re: Angle between two points

mikeharol1 — Tue, 25 Aug 2015 18:42:50 GMT

this seems to work for me thanks for help

double Rad2Degrees = 180 / Math.PI;

var lineBuilder = new LineBuilder(p1, p2);

var lineSeg = lineBuilder.ToSegment();

var degrees = lineSeg.Angle * Rad2Degrees;

degrees = 90 - degrees;

if (degrees < 0)

degrees = degrees + 360;