標高是建筑物的某一点相对于某一基准面(该基准面标高为0)的高差,如果基准面选择海平面则为绝对标高,同海拔一致;如果基准面选择建筑物的某一个面则为相对标高,反映建筑物或建筑群之间的高差关系、楼层间的层高等信息。多用于平面图、剖面图等工程图中。

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