50.412363 6.850681 50.413826 6.851762 50.412363 6.850681 50.413826 6.851762 50.412363 6.850681 50.412365 6.850692 50.412537 6.850730 50.412710 6.850782 50.412896 6.850801 50.413147 6.850963 50.413535 6.851330 50.413826 6.851762 160021 Entwicklung Quellen und Quellbäche Biotopkataster Flächen