Add ch.blw.erosion-quantitativ

git-svn-id: https://svn.bgdi.admin.ch/tilegenerator/trunk@453 bd729b38-e83c-4c31-ba7f-6b5d0bf862be
add new layers

git-svn-id: https://svn.bgdi.admin.ch/tilegenerator/trunk@454 bd729b38-e83c-4c31-ba7f-6b5d0bf862be