50.438932 6.752476 50.439365 6.753941 50.438932 6.752476 50.439365 6.753941 50.439358 6.752476 50.439365 6.752477 50.439320 6.752664 50.439253 6.752948 50.439141 6.753225 50.439029 6.753610 50.438976 6.753766 50.438932 6.753941 160125 Entwicklung Quellen und Quellbäche Biotopkataster Flächen