Implement getPointResolution for EPSG:3587

2013-03-03 17:17:13 +01:00
parent d3e49d0a19
commit 98d7391024
2 changed files with 59 additions and 0 deletions
--- a/src/ol/projection/epsg3857.js
+++ b/src/ol/projection/epsg3857.js
@@ -4,6 +4,7 @@ goog.require('goog.array');
 goog.require('ol.Extent');
 goog.require('ol.Projection');
 goog.require('ol.ProjectionUnits');
+goog.require('ol.math');
 goog.require('ol.projection');


@@ -128,3 +129,12 @@ ol.projection.EPSG3857.toEPSG4326 = function(input, opt_output, opt_dimension) {
  }
  return output;
 };
+
+
+/**
+ * @inheritDoc
+ */
+ol.projection.EPSG3857.prototype.getPointResolution =
+    function(resolution, point) {
+  return resolution / ol.math.cosh(point.y / ol.projection.EPSG3857.RADIUS);
+};