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Use ol.Projection#.getMetersPerUnit()

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As a follow-up to #815, this change makes
ol.tilegrid.createForProjection work in cases where a Proj4
projection does not have units set. For better code readability,
a new variable is used when calculating the resolution.
This commit is contained in:
ahocevar
2013-06-25 00:29:50 +02:00
parent 388967d00c
commit a14b21d80c
2 changed files with 15 additions and 3 deletions
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6
src/ol/tilegrid/tilegrid.js
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@@ -413,7 +413,7 @@ ol.tilegrid.createForProjection =
var projectionExtent = projection.getExtent();
var size = goog.isNull(projectionExtent) ?
360 * ol.METERS_PER_UNIT[ol.ProjectionUnits.DEGREES] /
ol.METERS_PER_UNIT[projection.getUnits()] :
projection.getMetersPerUnit() :
Math.max(projectionExtent[1] - projectionExtent[0],
projectionExtent[3] - projectionExtent[2]);
var maxZoom = goog.isDef(opt_maxZoom) ?
@@ -421,9 +421,9 @@ ol.tilegrid.createForProjection =
var tileSize = goog.isDef(opt_tileSize) ?
opt_tileSize : [ol.DEFAULT_TILE_SIZE, ol.DEFAULT_TILE_SIZE];
var resolutions = new Array(maxZoom + 1);
size = size / Math.max(tileSize[0], tileSize[1]);
var maxResolution = size / Math.max(tileSize[0], tileSize[1]);
for (var z = 0, zz = resolutions.length; z < zz; ++z) {
resolutions[z] = size / Math.pow(2, z);
resolutions[z] = maxResolution / Math.pow(2, z);
}
return new ol.tilegrid.TileGrid({
origin: goog.isNull(projectionExtent) ? [0, 0] :