Fixes for the WMTS layer to properly update matrix related properties. Determining the best matrix in the set based on current map resolution. Properly parsing TopLeftCorner coordinates and providing a way to specify identifiers for backwards CRS. r=ahocevar (closes #2677)

git-svn-id: http://svn.openlayers.org/trunk/openlayers@10570 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers/Format/WMTSCapabilities.js

@@ -31,7 +31,20 @@ OpenLayers.Format.WMTSCapabilities = OpenLayers.Class(OpenLayers.Format.XML, {
      * Property: parser
      * {<OpenLayers.Format>} A cached versioned format used for reading.
      */
-    parser: null,     
+    parser: null,
+    
+    /**
+     * APIProperty: yx
+     * {Object} Members in the yx object are used to determine if a CRS URN
+     *     corresponds to a CRS with y,x axis order.  Member names are CRS URNs
+     *     and values are boolean.  By default, the following CRS URN are 
+     *     assumed to correspond to a CRS with y,x axis order:
+     *
+     * * urn:ogc:def:crs:EPSG::4326
+     */
+    yx: {
+        "urn:ogc:def:crs:EPSG::4326": true
+    },
 
     /**
      * Constructor: OpenLayers.Format.WMTSCapabilities
@@ -70,9 +83,9 @@ OpenLayers.Format.WMTSCapabilities = OpenLayers.Class(OpenLayers.Format.XML, {
             if (!constr) {
                 throw new Error("Can't find a WMTS capabilities parser for version " + version);
             }
-            var parser = new constr(this.options);
+            this.parser = new constr(this.options);
         }
-        return parser.read(data);
+        return this.parser.read(data);
     },
 
     /**