Use regexp replacements in ol.proj.get

This avoids to have to many redundant identifier definitions for each projection and ensure to cover most of the existing srsNames

src/ol/proj/epsg3857.js

@@ -64,8 +64,6 @@ export const PROJECTIONS = [
   new EPSG3857Projection('EPSG:102100'),
   new EPSG3857Projection('EPSG:102113'),
   new EPSG3857Projection('EPSG:900913'),
-  new EPSG3857Projection('urn:ogc:def:crs:EPSG:6.18:3:3857'),
-  new EPSG3857Projection('urn:ogc:def:crs:EPSG::3857'),
   new EPSG3857Projection('http://www.opengis.net/gml/srs/epsg.xml#3857'),
 ];
 

src/ol/proj/epsg4326.js

@@ -61,11 +61,7 @@ class EPSG4326Projection extends Projection {
 export const PROJECTIONS = [
   new EPSG4326Projection('CRS:84'),
   new EPSG4326Projection('EPSG:4326', 'neu'),
-  new EPSG4326Projection('urn:ogc:def:crs:EPSG::4326', 'neu'),
-  new EPSG4326Projection('urn:ogc:def:crs:EPSG:6.6:4326', 'neu'),
   new EPSG4326Projection('urn:ogc:def:crs:OGC:1.3:CRS84'),
   new EPSG4326Projection('urn:ogc:def:crs:OGC:2:84'),
   new EPSG4326Projection('http://www.opengis.net/gml/srs/epsg.xml#4326', 'neu'),
-  new EPSG4326Projection('urn:x-ogc:def:crs:EPSG:4326', 'neu'),
-  new EPSG4326Projection('urn:x-ogc:def:crs:EPSG:6.6:4326', 'neu'),
 ];

src/ol/proj/projections.js

@@ -20,7 +20,11 @@ export function clear() {
  * @return {import("./Projection.js").default} The projection (if cached).
  */
 export function get(code) {
-  return cache[code] || null;
+  return (
+    cache[code] ||
+    cache[code.replace(/urn:(x-)?ogc:def:crs:EPSG:(.*:)?(\w+)$/, 'EPSG:$3')] ||
+    null
+  );
 }
 
 /**