Beginning with the nature and character of map symbols, it classifies coastal zone topographic map symbols and data according to the actual application.

从地图符号的本质和特征入手，根据具体应用把海岸带地形图符号进行分类和数据分层。

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Beginning with the nature and character of map symbols, it classifies coastal zone topographic map symbols and data according to the actual application.

从地图符号的本质和特征入手，根据具体应用把海岸带地形图符号进行分类和数据分层。

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