const

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

 var regionChooser = (function(){
 	//TODO: Somehow split in classes. This file is getting too big and mixed
 	var publicScope = {};
-	var fromJavaFX = navigator.userAgent.indexOf('JavaFX') !== -1;
-	var dataPanel = $('#dataPanel');
-	var wgs84Sphere = new ol.Sphere(6378137);
+	const fromJavaFX = navigator.userAgent.indexOf('JavaFX') !== -1;
+	const dataPanel = $('#dataPanel');
+	const wgs84Sphere = new ol.Sphere(6378137);
 	var features_by_project;
 	var gmlId;
 	
@@ -60,8 +60,8 @@ var regionChooser = (function(){
 		})
 	});
 
-	var geoJsonFormat = new ol.format.GeoJSON();
-	var kmlFormat = new ol.format.KML({extractStyles: false});
+	const geoJsonFormat = new ol.format.GeoJSON();
+	const kmlFormat = new ol.format.KML({extractStyles: false});
 
 	kml_source.addEventListener("addfeature", function() {
 		map.getView().fitExtent(kml_source.getExtent(), (map.getSize()));