From ad89f4965a05d37aeea1481c4ab53e21ab85ca2f Mon Sep 17 00:00:00 2001
From: 于紫祥_1901 <email@yuzixiang_1910>
Date: Wed, 12 Aug 2020 09:32:58 +0800
Subject: [PATCH] 风场图update

---
 src/main/java/com/moral/util/LatLngTransformation.java |   42 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 42 insertions(+), 0 deletions(-)

diff --git a/src/main/java/com/moral/util/LatLngTransformation.java b/src/main/java/com/moral/util/LatLngTransformation.java
new file mode 100644
index 0000000..db52054
--- /dev/null
+++ b/src/main/java/com/moral/util/LatLngTransformation.java
@@ -0,0 +1,42 @@
+package com.moral.util;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class LatLngTransformation {
+    private static final double x_pi = 3.14159265358979324 * 3000.0 / 180.0;
+    /// <summary>
+/// ��������������������� GCJ02 ��������������������������������������������� BD09 ������������
+/// </summary>
+/// <param name="lat">������</param>
+/// <param name="lng">������</param>
+    public static List Convert_GCJ02_To_BD09(double lat, double lng)
+    {
+        List list=new ArrayList();
+        double x = lng, 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);
+        lng = z * Math.cos(theta) + 0.0065;
+        lat = z * Math.sin(theta) + 0.006;
+        list.add(lng);
+        list.add(lat);
+        return list;
+    }
+    /// <summary>
+/// ��������������������� BD09 ��������������������� ��������������������� GCJ02 ���������������
+/// </summary>
+/// <param name="lat">������</param>
+/// <param name="lng">������</param>
+    public static List Convert_BD09_To_GCJ02(double lat,double lng)
+    {
+        List list=new ArrayList();
+        double x = lng - 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);
+        lng = z * Math.cos(theta);
+        lat = z * Math.sin(theta);
+        list.add(lng);
+        list.add(lat);
+        return list;
+    }
+}

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