93 lines
3.0 KiB
Python
93 lines
3.0 KiB
Python
#!/usr/bin/env python
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# -*-coding:utf-8 -*-
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'''
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# @Author ：幸运锦鲤
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# @Time : 2025-03-07 00:14:56
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# @version : python3
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# @Update time :
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# @Description : 百度地图坐标转换示例代码
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'''
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import math
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def bd09_to_gcj02(bd_lon, bd_lat):
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"""
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将 BD-09 坐标系转换为 GCJ-02 坐标系
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:param bd_lon: BD-09 经度
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:param bd_lat: BD-09 纬度
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:return: GCJ-02 坐标 (lon, lat)
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"""
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x = bd_lon - 0.0065
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y = bd_lat - 0.006
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z = math.sqrt(x * x + y * y) - 0.00002 * math.sin(y * math.pi)
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theta = math.atan2(y, x) - 0.000003 * math.cos(x * math.pi)
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gcj_lon = z * math.cos(theta)
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gcj_lat = z * math.sin(theta)
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return gcj_lon, gcj_lat
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def gcj02_to_wgs84(gcj_lon, gcj_lat):
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"""
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将 GCJ-02 坐标系转换为 WGS-84 坐标系
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:param gcj_lon: GCJ-02 经度
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:param gcj_lat: GCJ-02 纬度
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:return: WGS-84 坐标 (lon, lat)
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"""
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a = 6378245.0 # 克拉索夫斯基椭球参数长半轴
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ee = 0.00669342162296594323 # 克拉索夫斯基椭球参数第一偏心率平方
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PI = math.pi
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# 转换公式
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dLat = transform_lat(gcj_lon - 105.0, gcj_lat - 35.0)
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dLon = transform_lon(gcj_lon - 105.0, gcj_lat - 35.0)
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radLat = gcj_lat / 180.0 * PI
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magic = math.sin(radLat)
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magic = 1 - ee * magic * magic
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sqrtMagic = math.sqrt(magic)
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dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * PI)
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dLon = (dLon * 180.0) / (a / sqrtMagic * math.cos(radLat) * PI)
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wgs_lon = gcj_lon - dLon
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wgs_lat = gcj_lat - dLat
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return wgs_lon, wgs_lat
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def transform_lat(x, y):
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"""
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纬度转换公式
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"""
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ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * math.sqrt(abs(x))
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ret += (20.0 * math.sin(6.0 * x * math.pi) + 20.0 * math.sin(2.0 * x * math.pi)) * 2.0 / 3.0
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ret += (20.0 * math.sin(y * math.pi) + 40.0 * math.sin(y / 3.0 * math.pi)) * 2.0 / 3.0
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ret += (160.0 * math.sin(y / 12.0 * math.pi) + 320 * math.sin(y * math.pi / 30.0)) * 2.0 / 3.0
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return ret
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def transform_lon(x, y):
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"""
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经度转换公式
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"""
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ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * math.sqrt(abs(x))
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ret += (20.0 * math.sin(6.0 * x * math.pi) + 20.0 * math.sin(2.0 * x * math.pi)) * 2.0 / 3.0
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ret += (20.0 * math.sin(x * math.pi) + 40.0 * math.sin(x / 3.0 * math.pi)) * 2.0 / 3.0
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ret += (150.0 * math.sin(x / 12.0 * math.pi) + 300.0 * math.sin(x / 30.0 * math.pi)) * 2.0 / 3.0
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return ret
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def bd09_to_wgs84(bd_lon, bd_lat):
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"""
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将 BD-09 坐标系转换为 WGS-84 坐标系
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:param bd_lon: BD-09 经度
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:param bd_lat: BD-09 纬度
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:return: WGS-84 坐标 (lon, lat)
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"""
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# 先将 BD-09 转换为 GCJ-02
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gcj_lon, gcj_lat = bd09_to_gcj02(bd_lon, bd_lat)
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# 再将 GCJ-02 转换为 WGS-84
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wgs_lon, wgs_lat = gcj02_to_wgs84(gcj_lon, gcj_lat)
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return wgs_lon, wgs_lat
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# 示例
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bd_lon, bd_lat = 116.510484,39.896936 # 百度地图坐标
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wgs_lon, wgs_lat = bd09_to_wgs84(bd_lon, bd_lat)
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print(f"WGS-84 坐标: ({wgs_lon}, {wgs_lat})")
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