根据经纬度计算多边形的面积

这里有个前提是：你的经纬度点是依次相连接的点，不是无序的，可以是顺时针，或者逆时针都可以。

附python代码：

import math
def  ConvertToRadian(input):
    return input * math.pi / 180;

def CalculatePolygonArea0(data):
    area = 0;
    arr = data.split(';')
    arr_len = len(arr)
    if arr_len < 3:
        return 0.0
    temp = []
    for i in range(0, arr_len):
        temp.append([float(x) for x in arr[i].split(',')])
    for i in range(0, arr_len):
        area += ConvertToRadian(temp[(i + 1) % arr_len][0] - temp[(i) % arr_len][0]) * (2 + math.sin(ConvertToRadian(temp[(i) % arr_len][1])) + math.sin(ConvertToRadian(temp[(i + 1) % arr_len][1])));
    area = area * 6378137.0 * 6378137.0 / 2.0;
    return round(math.fabs(area),6);
if (__name__ == "__main__"):

data = "115.989099,39.646023;115.987394,39.645988;115.987371,39.647407;115.986684,39.647423;115.986602,39.648088;115.989095,39.648151;115.989188,39.646021;115.989099,39.646023"

print(CalculatePolygonArea0(data))

Calculate the area of polygon according to the longitude and latitude.

assuming your source is WGS1984, if not then you'll need to adjust the ellipsoid used by the  line（

area = area * 6378137.0 * 6378137.0 / 2.0;

）.