transverse_mercator.py 文件源码

def fromGeographic(self, lat, lon):
        lat_rad = radians(lat)
        lon_rad = radians(lon)
        B = cos(lat_rad) * sin(lon_rad - self.lon_rad)
        x = self.radius * atanh(B)
        y = self.radius * (atan(tan(lat_rad) / cos(lon_rad - self.lon_rad)) - self.lat_rad)
        return x, y