srsName should always be defined.

src/main/resources/eu/simstadt/regionchooser/website/script/simstadt_openlayers.js

@@ -67,7 +67,7 @@ var regionChooser = (function(){
 		feature.setId(gmlId++);
 		kml_source.addFeature(feature);
 		dataPanel.append('.');
-		srsName = feature.get("srsName") || "EPSG:31467";
+		srsName = feature.get("srsName");
 		if (proj4.defs(srsName) === undefined){
 			console.warning(srsName + " isn't defined by Proj4js!")
 		}
@@ -173,13 +173,8 @@ var regionChooser = (function(){
 	}
 	
 	publicScope.isDownloadPossible = function(){
-		var count = 0;
-		document.querySelectorAll("input.select_citygml").forEach(c => {
-			if (c.checked){
-				count += 1;
-			}
-		});
-		document.getElementById("download_region_button").disabled = (count == 0);
+		var checkedBoxes = Array.from(document.querySelectorAll("input.select_citygml")).filter(c => c.checked);
+		document.getElementById("download_region_button").disabled = (checkedBoxes.length == 0);
 	}
 	
 	function findIntersection(feature, polygon) {
@@ -228,7 +223,7 @@ var regionChooser = (function(){
 		})
 		
 		var project = features[0].get("project"); //TODO: Check all the same
-		var srsName = features[0].get("srsName") || "EPSG:31467"; //TODO: Check all the same
+		var srsName = features[0].get("srsName"); //TODO: Check all the same
 		var citygmlNames = features.map(f => f.get("name"));
 		// Waiting 100ms in order to let the cursor change
 		setTimeout(function() {
@@ -315,7 +310,6 @@ var regionChooser = (function(){
 	}
 	
 	function sketchAsWKT(srsName) {
-		srsName = (typeof srsName === 'undefined') ? 'EPSG:4326' : srsName;
 		var wktFormat = new ol.format.WKT();
 		return wktFormat.writeFeature(sketch, {
 			dataProjection : ol.proj.get(srsName),