Merge pull request #9060 from ahocevar/coordinate-convenience

Avoid unexpected behavior when passing string coordinates

src/ol/coordinate.js

@@ -40,8 +40,8 @@ import {padNumber} from './string.js';
  * @api
  */
 export function add(coordinate, delta) {
-  coordinate[0] += delta[0];
-  coordinate[1] += delta[1];
+  coordinate[0] += +delta[0];
+  coordinate[1] += +delta[1];
   return coordinate;
 }
 

src/ol/proj/epsg3857.js

@@ -106,7 +106,7 @@ export function fromEPSG4326(input, opt_output, opt_dimension) {
   for (let i = 0; i < length; i += dimension) {
     output[i] = halfSize * input[i] / 180;
     let y = RADIUS *
-        Math.log(Math.tan(Math.PI * (input[i + 1] + 90) / 360));
+        Math.log(Math.tan(Math.PI * (+input[i + 1] + 90) / 360));
     if (y > halfSize) {
       y = halfSize;
     } else if (y < -halfSize) {