41 lines
1.6 KiB
C#
41 lines
1.6 KiB
C#
using System;
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namespace 电子展板.Utility.Other
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{
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public class PositionUtils
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{
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private static double pi = 3.1415926535897932384626;
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private static double a = 6378245.0;
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private static double ee = 0.00669342162296594323;
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private static double bd_pi = 3.14159265358979324 * 3000.0 / 180.0;
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/// <summary>
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/// 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 将 GCJ-02 坐标转换成 BD-09 坐标
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/// </summary>
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/// <param name="lat"></param>
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/// <param name="lon"></param>
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public static void gcj02_To_Bd09(ref double lat, ref double lon)
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{
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double x = lon, y = lat;
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double z = Math.Sqrt(x * x + y * y) + 0.00002 * Math.Sin(y * bd_pi);
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double theta = Math.Atan2(y, x) + 0.000003 * Math.Cos(x * bd_pi);
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lon = z * Math.Cos(theta) + 0.0065;
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lat = z * Math.Sin(theta) + 0.006;
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}
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/// <summary>
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/// 火星坐标系 (GCJ-02) 与百度坐标系 (BD-09) 的转换算法 * * 将 BD-09 坐标转换成GCJ-02 坐标
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/// </summary>
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/// <param name="lat"></param>
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/// <param name="lon"></param>
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public static void bd09_To_Gcj02(ref double lat, ref double lon)
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{
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double x = lon - 0.0065, y = lat - 0.006;
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double z = Math.Sqrt(x * x + y * y) - 0.00002 * Math.Sin(y * bd_pi);
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double theta = Math.Atan2(y, x) - 0.000003 * Math.Cos(x * bd_pi);
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lon = z * Math.Cos(theta);
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lat = z * Math.Sin(theta);
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}
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}
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}
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