coastline of the year 2018 on the territory of the archipelago of Saint-Pierre and Miquelon

vector objects of a linear type made by joining the points from GPS surveys synchronised with the IGN markers on the communes of Saint-Pierre and Miquelon-Langlade.线性类型矢量对象（vector objects），由与圣皮埃尔和密克隆-朗格拉德市镇范围内的IGN（Institut Géographique National，法国国家地理研究院）标志物同步校准的GPS测量点位连接构建而成。