package com.jyt.infant.core.common; import java.util.HashMap; import java.util.Map; /** * * @ClassName: MarsCoordinateUtil * @Description: TODO(火星坐标转换) */ public class MarsCoordinateUtil { private double pi = 3.14159265358979324; private double a = 6378245.0; private double ee = 0.00669342162296594323; private double x_pi = 3.14159265358979324 * 3000.0 / 180.0; /** * * @Title: outOfChina * @Description: TODO(天朝范围内) * @param lat * @param lon * @return */ public 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; } /** * * @Title: transformLat * @Description: TODO(偏移调整) * @param x * @param y * @return */ public 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; } /** * * @Title: transformLon * @Description: TODO(偏移调整) * @param x * @param y * @return */ public 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; } /** * * @Title: transform2Mars * @Description: TODO(地球坐标转换为火星坐标 ) * @param lat * @param lon * @return */ public Map<String, Double> transform2Mars(double lat, double lon) { Map<String, Double> map = new HashMap<String, Double>(); if (!outOfChina(lat, lon)) { double dLat = transformLat(-105.0, lat - 35.0); double dLon = transformLon(lon - 105.0, lat - 35.0); double radLat = lat / 180.0 * pi; double magic = Math.sin(radLat); magic = 1 - ee * magic * magic; double sqrtMagic = Math.sqrt(magic); dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi); dLon = (dLon * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi); lat = lat + dLat; lon = lon + dLon; } map.put("latitude", lat); map.put("longitude", lon); return map; } /** * * @Title: bdEncrypt * @Description: TODO(火星坐标转换为百度坐标) * @param lat * @param lon * @return */ public Map<String, Double> bdEncrypt(double lat, double lon) { Map<String, Double> map = new HashMap<String, Double>(); double x = lon, y = lat; double z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi); double theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi); lon = z * Math.cos(theta) + 0.0065; lat = z * Math.sin(theta) + 0.006; map.put("latitude", lat); map.put("longitude", lon); return map; } /** * * @Title: bdDecrypt * @Description: TODO(百度转火星) * @param lat * @param lon * @return */ public Map<String, Double> bdDecrypt(double lat, double lon) { Map<String, Double> map = new HashMap<String, Double>(); double x = lon - 0.0065, y = lat - 0.006; double z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi); double theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi); lon = z * Math.cos(theta); lat = z * Math.sin(theta); map.put("latitude", lat); map.put("longitude", lon); return map; } }
实际坐标、火星坐标、百度坐标互转
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转载自fengzhi714.iteye.com/blog/2236070
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