吃喝玩乐

摘要： 返回单位：米static double Distance(double lon1, double lat1, double lon2, double lat2) { double R = 6378137; //地球半径 lat1 = lat1 * Math.PI / 180.0; lat2 = lat2 * Math.PI / 180.0; double sa2 = Math.Sin((lat1 - lat2) / 2.0); double sb2... 阅读全文