Electronic map is a new kind of map product. There is no uniform criterion and standard for its making. Therefore, it is necessary to study the laws and rules of electronic map design and production.

电子地图是一种新兴的地图产品，它的制作还没有统一的规范和标准，因此，有必要去研究电子地图设计生产中的一些法则性问题。

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Electronic map is a new kind of map product. There is no uniform criterion and standard for its making. Therefore, it is necessary to study the laws and rules of electronic map design and production.

电子地图是一种新兴的地图产品，它的制作还没有统一的规范和标准，因此，有必要去研究电子地图设计生产中的一些法则性问题。

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