目前各種坐標(biāo)系非常多，他們之間的轉(zhuǎn)換就是個(gè)比較麻煩的問(wèn)題。之前有個(gè)問(wèn)題，就是大疆的坐標(biāo)系在高德地圖上顯示發(fā)生了偏移，但是好在高德地圖提供了坐標(biāo)轉(zhuǎn)換的API，但是新的問(wèn)題來(lái)了，大疆的坐標(biāo)適應(yīng)了高德的坐標(biāo)系，但是選擇航點(diǎn)位置是在高德的地圖上，執(zhí)行卻是在大疆的坐標(biāo)系中，于是今天嘗試了多種解決方案后，最后發(fā)現(xiàn)還是得逆轉(zhuǎn)一下。

大疆坐標(biāo)系 WGS84 俗稱地球坐標(biāo)系

高德坐標(biāo)系 GCJ02 俗稱火星坐標(biāo)系(未考)

轉(zhuǎn)換代碼如下：

package com.jiataoyuan.toolsapp.utils;import com.amap.api.maps2d.CoordinateConverter; import com.amap.api.maps2d.model.LatLng;public class MapConvertUtils {private static double PI = Math.PI; // 圓周率private static double AXIS = 6378245.0; //軸private static double OFFSET = 0.00669342162296594323; //偏移量 (a^2 - b^2) / a^2// 坐標(biāo)轉(zhuǎn)換-轉(zhuǎn)為高德坐標(biāo)系(高德API)public LatLng getGDLatLng(double lat, double lng) {CoordinateConverter converter = new CoordinateConverter();// CoordType.GPS 待轉(zhuǎn)換坐標(biāo)類型converter.from(CoordinateConverter.CoordType.GPS);// sourceLatLng待轉(zhuǎn)換坐標(biāo)點(diǎn) DPoint類型converter.coord(new LatLng(lat, lng));// 執(zhí)行轉(zhuǎn)換操作LatLng desLatLng = converter.convert();return new LatLng(desLatLng.latitude, desLatLng.longitude);}// WGS84=》GCJ02 地球坐標(biāo)系=>火星坐標(biāo)系private static double[] wgs2GCJ(double wgLat, double wgLon) {double[] latlon = new double[2]; // if (outOfChina(wgLat, wgLon)) { // latlon[0] = wgLat; // latlon[1] = wgLon; // return latlon; // }double[] deltaD = delta(wgLat, wgLon);latlon[0] = wgLat + deltaD[0];latlon[1] = wgLon + deltaD[1];return latlon;}// 坐標(biāo)轉(zhuǎn)換-轉(zhuǎn)為大疆坐標(biāo)系//GCJ02=>WGS84 火星坐標(biāo)系=>地球坐標(biāo)系（精確）public static LatLng getDJILatLng(double gcjLat, double gcjLon) {double initDelta = 0.01;double threshold = 0.000000001;double dLat = initDelta, dLon = initDelta;double mLat = gcjLat - dLat, mLon = gcjLon - dLon;double pLat = gcjLat + dLat, pLon = gcjLon + dLon;double wgsLat, wgsLon, i = 0;while (true) {wgsLat = (mLat + pLat) / 2;wgsLon = (mLon + pLon) / 2;double[] tmp = wgs2GCJ(wgsLat, wgsLon);dLat = tmp[0] - gcjLat;dLon = tmp[1] - gcjLon;if ((Math.abs(dLat) < threshold) && (Math.abs(dLon) < threshold))break;if (dLat > 0) pLat = wgsLat;else mLat = wgsLat;if (dLon > 0) pLon = wgsLon;else mLon = wgsLon;if (++i > 10000) break;}return new LatLng(wgsLat, wgsLon);}// 轉(zhuǎn)換函數(shù)private static double[] delta(double wgLat, double wgLon) {double[] latlng = new double[2];double dLat = transformLat(wgLon - 105.0, wgLat - 35.0);double dLon = transformLon(wgLon - 105.0, wgLat - 35.0);double radLat = wgLat / 180.0 * PI;double magic = Math.sin(radLat);magic = 1 - OFFSET * magic * magic;double sqrtMagic = Math.sqrt(magic);dLat = (dLat * 180.0) / ((AXIS * (1 - OFFSET)) / (magic * sqrtMagic) * PI);dLon = (dLon * 180.0) / (AXIS / sqrtMagic * Math.cos(radLat) * PI);latlng[0] = dLat;latlng[1] = dLon;return latlng;}// 是否超出國(guó)界private static boolean outOfChina(double lat, double lon) {if (lon < 72.004 || lon > 137.8347)return true;if (lat < 0.8293 || lat > 55.8271)return true;return false;}// 轉(zhuǎn)換緯度private static double transformLat(double x, double y) {double ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));ret += (20.0 * Math.sin(6.0 * x * PI) + 20.0 * Math.sin(2.0 * x * PI)) * 2.0 / 3.0;ret += (20.0 * Math.sin(y * PI) + 40.0 * Math.sin(y / 3.0 * PI)) * 2.0 / 3.0;ret += (160.0 * Math.sin(y / 12.0 * PI) + 320 * Math.sin(y * PI / 30.0)) * 2.0 / 3.0;return ret;}// 轉(zhuǎn)換經(jīng)度private static double transformLon(double x, double y) {double ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));ret += (20.0 * Math.sin(6.0 * x * PI) + 20.0 * Math.sin(2.0 * x * PI)) * 2.0 / 3.0;ret += (20.0 * Math.sin(x * PI) + 40.0 * Math.sin(x / 3.0 * PI)) * 2.0 / 3.0;ret += (150.0 * Math.sin(x / 12.0 * PI) + 300.0 * Math.sin(x / 30.0 * PI)) * 2.0 / 3.0;return ret;} }

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