Fix: Force '.' as decimal separator for BBox-WKT

CityDoctorParent/CityDoctorModel/src/main/java/de/hft/stuttgart/citydoctor2/datastructure/BoundingBox.java

@@ -24,6 +24,7 @@ import de.hft.stuttgart.citydoctor2.utils.visitors.MinMaxExtentVisitor;
 
 import java.util.Collection;
 import java.util.List;
+import java.util.Locale;
 
 /**
  * An axis aligned bounding box represented by its two corners
@@ -201,7 +202,7 @@ public class BoundingBox {
         double maxX = Math.max(x1, x2);
         double maxY = Math.max(y1, y2);
 
-        return String.format("POLYGON((%.3f %.3f, %.3f %.3f, %.3f %.3f, %.3f %.3f, %.3f %.3f))",
+        return String.format(Locale.ROOT,"POLYGON((%.3f %.3f, %.3f %.3f, %.3f %.3f, %.3f %.3f, %.3f %.3f))",
                 minX, minY,
                 maxX, minY,
                 maxX, maxY,