Landscape map Trier – Protected groundwater – Landscape plan Trier – Protected groundwater

Landscape map – Theme map (3a) ‘Protective groundwater’ of the city of Trier (areas and lines). Status:2010:Landscape map (3a) ‘Protective groundwater’ of the city of Trier (areas and lines). As of:2010景观地图——专题地图（Theme Map，3a类）：特里尔市‘防护性地下水’要素图层（含面状要素与线状要素），数据时效为2010年。