c＃.Net中的Circlular Geofencing(Circlular Geofencing in c#.Net)

c＃.Net中的Circlular Geofencing(Circlular Geofencing in c#.Net)

我在Bing地图中画了一个圆圈。 现在我需要编写一个点（纬度，经度）是在圆圈内部还是外部的代码？

c＃.Net中是否有任何算法代码？

I have drawn a circle in Bing maps. Now I need to write code for whether a point (latitude, longitude) is inside or outside of the circle?

Is there any algorithmic code in c#.Net?

最满意答案

只需计算distance between the center of the circle and your current coordinate的distance between the center of the circle and your current coordinate ，并将此距离与圆半径进行比较（距离<=半径表示坐标位于圆内）。

要计算两点之间的距离，请使用Haversine公式 。

你会在这里找到一个C＃实现。

Just compute the distance between the center of the circle and your current coordinate, and compare this distance to the circle radius (distance <= radius means the coordinate is inside the circle).

To compute the distance between two points, use the Haversine formula.

You'll find a C# implementation here.