使用GeoUtils.getPolygonArea方法计算面积时会报错

[guozhl]

问题描述：

使用DrawingManager画多边形的时候，如果一直在一个地方点击鼠标，最后得到覆盖物的坐标数组会有很多个连续相同的坐标。然后使用GeoUtils.getPolygonArea方法计算面积得到的结果是NaN

坐标示例：

[{"lng":116.05931967048495,"lat":39.94503428079636}, {"lng":116.10761257470138,"lat":39.94149394355425}, {"lng":116.10761257470138,"lat":39.94149394355425}, {"lng":116.1064627436486,"lat":39.92688810062903}, {"lng":116.08749053127787,"lat":39.91050811648429}, {"lng":116.08749053127787,"lat":39.91050811648429}, {"lng":116.06851831890714,"lat":39.9144928004373}, {"lng":116.06851831890714,"lat":39.9144928004373}, {"lng":116.05931967048495,"lat":39.94503428079636}]

使用的js

//mapopen.cdn.bcebos.com/github/BMapGLLib/GeoUtils/src/GeoUtils.min.js

[FloraCat526]

鼠标绘制与面积计算可以使用新的鼠标绘制库BMap-Draw，https://www.npmjs.com/package/bmap-draw