?墨卡托坐標(biāo)轉(zhuǎn)換 此方法轉(zhuǎn)換結(jié)果最接近騰訊地圖文章來源地址http://www.zghlxwxcb.cn/news/detail-417595.html

package cn.ydxiaoshuai.gis;


import java.math.BigDecimal;

/**
 * Description 墨卡托坐標(biāo)轉(zhuǎn)換 此方法轉(zhuǎn)換結(jié)果最接近騰訊地圖
 *             https://lbs.qq.com/service/webService/webServiceGuide/webServiceTranslate
 * ProjectName worktools
 * Created by 小帥丶 on 2023-04-17 16:28.
 * Version 1.0
 */

public class MercatorWGS84ConvertUtil {

    /**
     * @EARTH_CIRCLE_HALF 地球赤道周長的一半
     *                    地球半徑6378137米，赤道周長2*PI*r = 2 * 20037508.3427892，
     *                    墨卡托坐標(biāo)x軸區(qū)間[-20037508.3427892,20037508.3427892]
     *                    墨卡托坐標(biāo)系：展開地球，赤道作為x軸，向東為x軸正方，本初子午線作為y軸，向北為y軸正方向。
     **/
    private static BigDecimal EARTH_CIRCLE_HALF = new BigDecimal(20037508.34);

    /**
     * @EARTH_RADIUS 地球半徑
     **/
    private static BigDecimal EARTH_RADIUS = new BigDecimal(6378137.0);

    /**
     * @STRAIGHT_ANGLE 平角 180°
     **/
    private static BigDecimal STRAIGHT_ANGLE = new BigDecimal(180);

    private static CoordinateBean  mercatorToWGS84(BigDecimal mercatorLngX,
                                                   BigDecimal  mercatorLatY){
        CoordinateBean coord = new CoordinateBean();
        BigDecimal coordLng = mercatorLngX.divide(EARTH_CIRCLE_HALF,BigDecimal.ROUND_CEILING).setScale(4,BigDecimal.ROUND_HALF_EVEN)
                .multiply(STRAIGHT_ANGLE).setScale(4,BigDecimal.ROUND_HALF_EVEN);
        BigDecimal coordLat = mercatorLatY.divide(EARTH_CIRCLE_HALF,BigDecimal.ROUND_CEILING).setScale(4,BigDecimal.ROUND_HALF_EVEN)
                .multiply(STRAIGHT_ANGLE).setScale(4,BigDecimal.ROUND_HALF_EVEN);
        Double tempLat = STRAIGHT_ANGLE.doubleValue() /
                Math.PI * (2 * Math.atan(Math.exp(coordLat.doubleValue() * Math.PI /
                STRAIGHT_ANGLE.doubleValue())) - Math.PI / 2);
        coordLat =  new BigDecimal(tempLat).setScale(4,BigDecimal.ROUND_HALF_EVEN);
        coord.setCoordLngX(coordLng);
        coord.setCoordLatY(coordLat);
        System.out.println(coordLng.doubleValue() + "===" + coordLat);
        return coord;
    }

    private static CoordinateBean WGS84ToMercator(BigDecimal lng,
                                                  BigDecimal lat){
        CoordinateBean coord = new CoordinateBean();
        BigDecimal PI = new BigDecimal(Math.PI);
        BigDecimal coordLng = lng.multiply(PI)
                .divide(STRAIGHT_ANGLE,BigDecimal.ROUND_CEILING)
                .multiply(EARTH_RADIUS)
                .setScale(4,BigDecimal.ROUND_HALF_EVEN);
        BigDecimal tempParam = lat.multiply(PI).divide(STRAIGHT_ANGLE,BigDecimal.ROUND_CEILING)
                .setScale(4,BigDecimal.ROUND_HALF_EVEN);
        Double tempLat = EARTH_RADIUS.doubleValue()
                / 2 * Math.log((1.0 + Math.sin(tempParam.doubleValue()))
                / (1.0 - Math.sin(tempParam.doubleValue())));
        BigDecimal coordLat = new BigDecimal(tempLat).setScale(4,BigDecimal.ROUND_HALF_EVEN);
        coord.setCoordLngX(coordLng);
        coord.setCoordLatY(coordLat);
        System.out.println(coordLng.toPlainString() + "===" + coordLat.toPlainString());
        return coord;
    }


    public static void main(String[] args) {
        BigDecimal coordLng = new BigDecimal(39419429.2936);
        BigDecimal coordLat = new BigDecimal(4452052.1597);
        //代碼轉(zhuǎn)換 39.996===89.7629 騰訊地圖 轉(zhuǎn)換 39.99303 === 89.740407
        mercatorToWGS84(coordLat,coordLng);
    }
}

package cn.ydxiaoshuai.gis;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.math.BigDecimal;

/**
 * Description
 * ProjectName workdemo
 * Created by 小帥丶 on 2023-04-17 17:09.
 * Version 1.0
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
public class CoordinateBean {
    private BigDecimal coordLngX;
    private BigDecimal coordLatY;
}

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