Get new point coordinate by current Point coordinate, angle and distance

mohameantar

Hello all,

i want to create new point to be away by specific angle and distance from existing point .

i checked geometryEngine.offset but its working only for polyline or polygon not working for points also i need to control the angle so i create the new point up or down not only right and left.

Thank you all

 

 

AndyGup

I have some code that uses latitude and longitude as input values to calculate a second point based on bearing and distance. Haven't used this in quite a while. I'm not sure how much efficiency you need, you would have handle any additional coordinate conversions:

        function bearingDistance(lat, lon, radius, bearing){
          const lat1Rads = toRad(lat);
          const lon1Rads = toRad(lon);
          const R_KM = 6371; // radius in KM
          const d = radius/R_KM; //angular distance on earth's surface

          const bearingRads = toRad(bearing);
          const lat2Rads = Math.asin(
            Math.sin(lat1Rads) * Math.cos(d) + Math.cos(lat1Rads) * Math.sin(d) * Math.cos(bearingRads)
          );

          const lon2Rads = lon1Rads + Math.atan2(
            Math.sin(bearingRads) * Math.sin(d) * Math.cos(lat1Rads),
            Math.cos(d) - Math.sin(lat1Rads) * Math.sin(lat2Rads)
          );

          return {
            latitude: toDeg(lat2Rads),
            longitude: toDeg(lon2Rads)
          }          
        }

        function toRad(degrees){
          return degrees * Math.PI / 180;
        }

        function toDeg(radians){
          return radians * 180 / Math.PI;
        }