hi the ellipse shape is awesome!
however, i tried to set the x_axis to 1000 meters and y_axis to 300 meters.
when i try to measure the ellipse on the map (with the esri polyline sketch feature), looks like the result on the map is not in any unit.
for example: x_axis of 1000 meter i measured 28,730.49 meters and for y_axis of 300 meters i measured 10,470.08 meters.
i expected to get the result in other unit like kilometers, miles, meters or any other and then to convert to the units i want (meters). which means the expected result is 10,000 meters if the function calc in km.
any ideas how to get the result in meters on the map?
const getPointsForEllipse = (lat1, lon1, xaxis, yaxis, rotation) => {
//axis distance in km
var rEarth = 6371.01; //# Earth's average radius in km
var rXaxis = (xaxis) / rEarth;
var rYaxis = (yaxis) / rEarth; //that shall be km distance, just use xaxis/yaxis at line 44, 45 if you want to measure by dms
var rRotation = degree2Radium(rotation);
var polygonRings = [];
for(var i=0;i<=360;i+=10){
var t = degree2Radium(i);// # ellipse math ref
var x = rXaxis * Math.cos(t);// # ellipse math
var y = rYaxis * Math.sin(t);// # ellipse math
var rot_x = lon1 +(x*Math.cos(rRotation))-(y*Math.sin(rRotation));// # rotate/transpose ellipse
var rot_y = lat1 +(y*Math.cos(rRotation))+(x*Math.sin(rRotation));// # rotate/transpose ellipse
polygonRings.push([rot_x, rot_y]);
}
return polygonRings;
};
const center_lat = 32.3;
const center_lon = 35.0;
const x_axis = 1000;
const y_axis = 300;
const rotation = 70;
getPointsForEllipse = (lat1, lon1, xaxis, yaxis, rotation)
