polygon - Center of polygon in gmap.net

Question

I'm using Gmap.Get great mapping tools to develop an enterprise software. How to calculate center of polygon in Gmap.Net using polygon points?

Answer 1

RectLatLng用多边形的点计算。

double lat = points.Max(item => item.Lat);
double lng = points.Min(item => item.Lng);

double height = lat - points.Min(item => item.Lat);
double width = points.Max(item => item.Lng) - lng;

var rect = new RectLatLng(lat, lng, width, height);

并且rect.LocationMiddle是中心。

Answer 2

使用以下代码在 Gmap.Net 中计算多边形的中心：

Private Function CalculateCenterOfPolygon(polyPoints As List(Of PointLatLng)) As PointLatLng
    Dim centerPoint As New PointLatLng()
    Dim sum As Integer = 0
    Dim Lat As Double = 0
    Dim Lng As Double = 0
    For Each point As PointLatLng In polyPoints
        sum += 1
        Lat += point.Lat
        Lng += point.Lng
    Next
    Lat = Lat / sum
    Lng = Lng / sum

    centerPoint.Lat = Lat
    centerPoint.Lng = Lng

    Return centerPoint
End Function