使用这些技术、地理编码模块和地图工具，您有无数种选择可以创建按地区色彩渐变和按城市标绘的地图。

With these techniques and the geocoding modules and mapping tools, you have myriad options for creating region shaded and city-plotted maps.

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记录和标绘的罗盘读数最好都是真正的方位。

It is best to record and plot all compass readings as true bearings.

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因此，开发过程必然涉及到矢量符号设计和标绘的问题。

Therefore it is inevitable to lead to the problem of designing and marking vector symbols.

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