百度坐标 火星坐标 相互转换 php

原创
2017/11/10 13:36
阅读数 281
    public $x_pi = 3.14159265358979324 * 3000.0 / 180.0;  
    
    private function bd_encrypt($gg_lat, $gg_lon)  
    {  
        $x = $gg_lon;
        $y = $gg_lat;  
        $z = sqrt($x * $x + $y * $y) + 0.00002 * sin($y * $this->x_pi);  
        $theta = atan2($y, $x) + 0.000003 * cos($x * $this->x_pi);  
        $bd_lon = $z * cos($theta) + 0.0065;  
        $bd_lat = $z * sin($theta) + 0.006;  
        return [$bd_lat, $bd_lon];
    }  
      
    private function bd_decrypt($bd_lat, $bd_lon)  
    {  
        $x = $bd_lon - 0.0065;
        $y = $bd_lat - 0.006;  
        $z = sqrt($x * $x + $y * $y) - 0.00002 * sin($y *  $this->x_pi);  
        $theta = atan2($y, $x) - 0.000003 * cos($x * $this->x_pi);  
        $gg_lon = $z * cos($theta);  
        $gg_lat = $z * sin($theta);  
        return [$gg_lat, $gg_lon];
    }  


原: http://blog.csdn.net/coolypf/article/details/8569813

展开阅读全文
打赏
0
0 收藏
分享
加载中
更多评论
打赏
0 评论
0 收藏
0
分享
返回顶部
顶部