Cesium插件
你好，我是cesium的新手，不知道是否是我操作上的问题
想请问一下这个插件是不是已经不能使用了啊
我下载了你的范例，可以打开，但是点上面任何一个按钮都无效益
能否稍为告知我哪边错误了
谢谢
I find that the area measure may calculate error sometimes. Like this:
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A declarative, efficient, and flexible JavaScript library for building user interfaces.
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