地图图形往往具有一定程度的空间结构特征，例如树枝状水系、棋盘状街道网等。

There are many structural units on maps, such as dendriform drainage and orthogonal streets.

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地图图形往往具有一定程度的空间结构特征，例如树枝状水系、棋盘状街道网等。

There are many structural units on maps, such as dendriform drainage and orthogonal streets.

youdao