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Function for getting great circle lengths

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This commit is contained in:
Tim Schaub
2017-08-10 17:45:22 -06:00
parent 445c157ee3
commit 92c62e5432
5 changed files with 212 additions and 18 deletions
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8
src/ol/proj.js
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@@ -22,11 +22,11 @@ ol.proj.METERS_PER_UNIT = ol.proj.Units.METERS_PER_UNIT;
/**
* A place to store the radius of the Clarke 1866 Authalic Sphere.
* A place to store the mean radius of the Earth.
* @private
* @type {ol.Sphere}
*/
ol.proj.AUTHALIC_SPHERE_ = new ol.Sphere(6370997);
ol.proj.SPHERE_ = new ol.Sphere(ol.Sphere.DEFAULT_RADIUS);
if (ol.ENABLE_PROJ4JS) {
@@ -90,9 +90,9 @@ ol.proj.getPointResolution = function(projection, resolution, point, opt_units)
point[0], point[1] + resolution / 2
];
vertices = toEPSG4326(vertices, vertices, 2);
var width = ol.proj.AUTHALIC_SPHERE_.haversineDistance(
var width = ol.proj.SPHERE_.haversineDistance(
vertices.slice(0, 2), vertices.slice(2, 4));
var height = ol.proj.AUTHALIC_SPHERE_.haversineDistance(
var height = ol.proj.SPHERE_.haversineDistance(
vertices.slice(4, 6), vertices.slice(6, 8));
pointResolution = (width + height) / 2;
var metersPerUnit = opt_units ?