php gps怎么转gcj-02

2023-05-14 20:05:00 gps php gcj

PHP gps转GCj-02的方法：1、创建一个php示例文件；2、通过“public static function wgs84ToGcj02 (float $lng, float $lat):array {...}”方法将WGS84转为GCJ02即可。

php gps怎么转gcj-02

本教程操作环境：windows10系统、PHP8.1版、DELL G3电脑

php gps怎么转gcj-02？

php 经纬度坐标转换 WGS84、火星坐标 (GCJ-02)、百度坐标 (BD-09)

项目有gps上报的功能, 由于前端插件问题导致大量gps定位数据转换百度坐标(BD-09)时产生极大偏移, 故需要后端做经纬度坐标转换, 看到一篇java的相关技术帖, 拿来做了修改

Ps: 坐标转换稍有偏差,在可接受范围内

百度经纬度纠偏api: Http://api.map.baidu.com/ag/coord/convert

php代码:

<?php
 
 
namespace App\Tool;
 

class GpsUtils {
    const x_pi = 3.14159265358979324 * 3000.0 / 180.0;
    // π
    const pi = 3.1415926535897932384626;
    // 长半轴
    const a = 6378245.0;
    // 扁率
    const ee = 0.00669342162296594323;
 
    
    public static function bd09ToWgs84 (float $lng, float $lat): array {
        $gcj = self::bd09ToGcj02($lng, $lat);
        return self::gcj02ToWgs84($gcj[0], $gcj[1]);
    }
 
    
    public static function wgs84ToBd09 (float $lng, float $lat): array {
        $gcj = self::wgs84ToGcj02($lng, $lat);
        return self::gcj02ToBd09($gcj[0], $gcj[1]);
    }
 
    
    public static function gcj02ToBd09 (float $lng, float $lat): array {
        $z = sqrt($lng * $lng + $lat * $lat) + 0.00002 * sin($lat * self::x_pi);
        $theta = atan2($lat, $lng) + 0.000003 * cos($lng * self::x_pi);
        $bd_lng = $z * cos($theta) + 0.0065;
        $bd_lat = $z * sin($theta) + 0.006;
        return [$bd_lng, $bd_lat];
    }
 
    
    public static function bd09ToGcj02 (float $bd_lon, float $bd_lat): array {
        $x = $bd_lon - 0.0065;
        $y = $bd_lat - 0.006;
        $z = sqrt($x * $x + $y * $y) - 0.00002 * sin($y * self::x_pi);
        $theta = atan2($y, $x) - 0.000003 * cos($x * self::x_pi);
        $gg_lng = $z * cos($theta);
        $gg_lat = $z * sin($theta);
        return [$gg_lng, $gg_lat];
    }
 
    
    public static function wgs84ToGcj02 (float $lng, float $lat): array {
        $d_lat = self::transfORMlat($lng - 105.0, $lat - 35.0);
        $d_lng = self::transformlng($lng - 105.0, $lat - 35.0);
        $rad_lat = $lat / 180.0 * self::pi;
        $magic = sin($rad_lat);
        $magic = 1 - self::ee * $magic * $magic;
        $sqrt_magic = sqrt($magic);
        $d_lat = ($d_lat * 180.0) / ((self::a * (1 - self::ee)) / ($magic * $sqrt_magic) * self::pi);
        $d_lng = ($d_lng * 180.0) / (self::a / $sqrt_magic * cos($rad_lat) * self::pi);
        $mg_lat = $lat + $d_lat;
        $mg_lng = $lng + $d_lng;
        return [$mg_lng, $mg_lat];
    }
 
    
    public static function gcj02ToWgs84 (float $lng, float $lat): array {
        $d_lat = self::transformlat($lng - 105.0, $lat - 35.0);
        $d_lng = self::transformlng($lng - 105.0, $lat - 35.0);
        $rad_lat = $lat / 180.0 * self::pi;
        $magic = sin($rad_lat);
        $magic = 1 - self::ee * $magic * $magic;
        $sqrt_magic = sqrt($magic);
        $d_lat = ($d_lat * 180.0) / ((self::a * (1 - self::ee)) / ($magic * $sqrt_magic) * self::pi);
        $d_lng = ($d_lng * 180.0) / (self::a / $sqrt_magic * cos($rad_lat) * self::pi);
        $mg_lat = $lat + $d_lat;
        $mg_lng = $lng + $d_lng;
        return [$lng * 2 - $mg_lng, $lat * 2 - $mg_lat];
    }
 
    
    public static function transFormLat (float $lng, float $lat): float {
        $ret = -100.0 + 2.0 * $lng + 3.0 * $lat + 0.2 * $lat * $lat + 0.1 * $lng * $lat + 0.2 * sqrt(abs($lng));
        $ret += (20.0 * sin(6.0 * $lng * self::pi) + 20.0 * sin(2.0 * $lng * self::pi)) * 2.0 / 3.0;
        $ret += (20.0 * sin($lat * self::pi) + 40.0 * sin($lat / 3.0 * self::pi)) * 2.0 / 3.0;
        $ret += (160.0 * sin($lat / 12.0 * self::pi) + 320 * sin($lat * self::pi / 30.0)) * 2.0 / 3.0;
        return $ret;
    }
 
    
    public static function transFormLng (float $lng, float $lat): float {
        $ret = 300.0 + $lng + 2.0 * $lat + 0.1 * $lng * $lng + 0.1 * $lng * $lat + 0.1 * sqrt(abs($lng));
        $ret += (20.0 * sin(6.0 * $lng * self::pi) + 20.0 * sin(2.0 * $lng * self::pi)) * 2.0 / 3.0;
        $ret += (20.0 * sin($lng * self::pi) + 40.0 * sin($lng / 3.0 * self::pi)) * 2.0 / 3.0;
        $ret += (150.0 * sin($lng / 12.0 * self::pi) + 300.0 * sin($lng / 30.0 * self::pi)) * 2.0 / 3.0;
        return $ret;
    }
}