From bc306e56decb7ae54c94f3be92cddcd455e0111f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=A4=A7=E9=BB=84=E8=9C=82coder?= <chinesezwf@gmail.com>
Date: Thu, 15 Dec 2022 18:24:46 +0800
Subject: [PATCH] =?UTF-8?q?WGS84=20=E5=9D=90=E6=A0=87=E4=B8=8E=E5=A2=A8?=
 =?UTF-8?q?=E5=8D=A1=E6=89=98=E6=8A=95=E5=BD=B1=E4=BA=92=E8=BD=AC?=
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WGS84 坐标与墨卡托投影互转
---
 .../cn/hutool/core/util/CoordinateUtil.java   | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/hutool-core/src/main/java/cn/hutool/core/util/CoordinateUtil.java b/hutool-core/src/main/java/cn/hutool/core/util/CoordinateUtil.java
index 04ad3b485..554962c9e 100644
--- a/hutool-core/src/main/java/cn/hutool/core/util/CoordinateUtil.java
+++ b/hutool-core/src/main/java/cn/hutool/core/util/CoordinateUtil.java
@@ -133,6 +133,34 @@ public class CoordinateUtil {
 		return gcj02ToWgs84(gcj02.lng, gcj02.lat);
 	}
 
+	/**
+        * WGS84 坐标转为 墨卡托投影
+        *
+	* @param lng 经度值
+	* @param lat 纬度值
+	* @return 墨卡托投影
+	*/
+	public static Coordinate wgs84ToMercator(double lng, double lat) {
+		double x = lng * 20037508.342789 / 180;
+		double y = Math.log(Math.tan((90 + lat) * Math.PI / 360)) / (Math.PI / 180);
+		y = y * 20037508.34789 / 180;
+		return new Coordinate(x, y);
+	}
+
+	/**
+	* 墨卡托投影 转为 WGS84 坐标
+	*
+	* @param mercatorX 墨卡托X坐标
+	* @param mercatorY 墨卡托Y坐标
+	* @return WGS84 坐标
+	*/
+	public static Coordinate mercatorToWgs84(double mercatorX, double mercatorY) {
+		double x = mercatorX / 20037508.34 * 180;
+		double y = mercatorY / 20037508.34 * 180;
+		y = 180 / Math.PI * (2 * Math.atan(Math.exp(y * Math.PI / 180)) - Math.PI / 2);
+		return new Coordinate(x, y);
+	}
+	
 	//----------------------------------------------------------------------------------- Private methods begin
 
 	/**