dotspatial 1.9 measure工具调用

老得functionMode 变了。 引用：https://www.cnblogs.com/kogame/p/12326821.html   Dotspatial DotSpatial.Plugins.Measure工具的调用 DotSpatial.Plugins.Measure.MapFunctionMeasure mapFunctionMeasure = new DotSpatial.Plug

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