Land defences

A land weather is a late medieval (often 14th or 15th century) earthen shore that was built to secure the territory outside a settlement. Land defences are about two meters high — and including dry canals on either side of the shore — four to ten meters wide. The earthen ramparts were planted densely with thorn bushes and lamewood or sometimes with palisades. In this way, they posed significant obstacles to unwanted visitors. Most of the remains of land defences lie in Limburg and on the sandy soils of Gelderland and Overijssel. A large part of the approximately 100 land defences in the Netherlands has completely disappeared. The dataset ‘landweren’ consists of a line and a point file.土地防御岸堤是中世纪晚期（通常为14至15世纪）的土筑岸堤，用于加固聚落外围的领地。此类土制防御工事净高约两米，若包含堤岸两侧的干渠，总宽度可达4至10米。土筑壁垒上密植荆棘灌丛与硬木（lamewood），有时还会加装栅栏，以此为未经许可的访客设置了显著的通行障碍。现存的土地防御工事遗迹大多分布于林堡省（Limburg）、海尔德兰省（Gelderland）与上艾瑟尔省（Overijssel）的沙质土壤区域。荷兰境内约有100处此类防御工事，其中相当一部分已完全消失。本次公开的“兰德沃伦（landweren）”数据集包含线要素文件与点要素文件。