#!/usr/bin/env python3.6.5
# -*- coding: UTF-8 -*-
"""
Author: ReddingtonLin
Date: 2020/4/1 14:23
docs:
GPS坐标转换：
WGS-84：是国际标准，GPS坐标（Google Earth使用、或者GPS模块）
GCJ-02：中国坐标偏移标准，Google Map、高德、腾讯使用
BD-09：百度坐标偏移标准，Baidu Map使用
"""
import math
def transformlat(x, y):
ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * math.sqrt(abs(x))
ret += (20.0 * math.sin(6.0 * x * math.pi) + 20.0 * math.sin(2.0 * x * math.pi)) * 2.0 / 3.0
ret += (20.0 * math.sin(y * math.pi) + 40.0 * math.sin(y / 3.0 * math.pi)) * 2.0 / 3.0
ret += (160.0 * math.sin(y / 12.0 * math.pi) + 320 * math.sin(y * math.pi / 30.0)) * 2.0 / 3.0
return ret
def transformlon(x, y):
ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * math.sqrt(abs(x))
ret += (20.0 * math.sin(6.0 * x * math.pi) + 20.0 * math.sin(2.0 * x * math.pi)) * 2.0 / 3.0
ret += (20.0 * math.sin(x * math.pi) + 40.0 * math.sin(x / 3.0 * math.pi)) * 2.0 / 3.0
ret += (150.0 * math.sin(x / 12.0 * math.pi) + 300.0 * math.sin(x / 30.0 * math.pi)) * 2.0 / 3.0
return ret
def delta(lng, lat):
a = 6378245.0
# a: 卫星椭球坐标投影到平面地图坐标系的投影因子
ee = 0.00669342162296594323
# ee: 椭球的偏心率
dLat = transformlat(lng - 105.0, lat - 35.0)
dLon = transformlon(lng - 105.0, lat - 35.0)
radLat = lat / 180.0 * math.pi
magic = math.sin(radLat)
magic = 1 - ee * magic * magic
sqrtMagic = math.sqrt(magic)
dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * math.pi)
dLon = (dLon * 180.0) / (a / sqrtMagic * math.cos(radLat) * math.pi)
return dLon, dLat
def wgs2gcj(wgsLng, wgsLat):
"""
WGS-84转成GCJ-02
"""
if outOfChina(wgsLng, wgsLat):
print("The latitude or longitude is out of China!")
return wgsLng, wgsLat
lng, lat = delta(wgsLng, wgsLat)
return wgsLng + lng, wgsLat + lat
def gcj2wgs_rough(gcjLon, gcjLat):
"""
GCJ-02 转 WGS-84 粗略版
"""
if outOfChina(gcjLon, gcjLat):
print("The latitude or longitude is out of China!")
return gcjLon, gcjLat
lng, lat = delta(gcjLon, gcjLat)
return gcjLon - lng, gcjLat - lat
def gcj2wgs_accurate(gcjLon, gcjLat):
"""
GCJ-02 转 WGS-84 精确版
"""
initDelta = 0.01
threshold = 0.000000001
dLat = initDelta
dLon = initDelta
mLat = gcjLat - dLat
mLon = gcjLon - dLon
pLat = gcjLat + dLat
pLon = gcjLon + dLon
wgsLat = 0
wgsLon = 0
i = 0
while 1:
wgsLat = (mLat + pLat) / 2
wgsLon = (mLon + pLon) / 2
lon, lat = gcj2wgs_rough(wgsLon, wgsLat)
dLat = lat - gcjLat
dLon = lon - gcjLon
if (abs(dLat) < threshold) and (abs(dLon) < threshold):
break
if dLat > 0:
pLat = wgsLat
else:
mLat = wgsLat
if dLon > 0:
pLon = wgsLon
else:
mLon = wgsLon
if ++i > 10000:
break
return wgsLon, wgsLat
def gcj2bd(gcjLon, gcjLat):
"""
GCJ-02 转 BD-09
"""
x_pi = math.pi * 3000.0 / 180.0
x = gcjLon
y = gcjLat
z = math.sqrt(x * x + y * y) + 0.00002 * math.sin(y * x_pi)
theta = math.atan2(y, x) + 0.000003 * math.cos(x * x_pi)
bdLon = z * math.cos(theta) + 0.0065
bdLat = z * math.sin(theta) + 0.006
return bdLon, bdLat
def bd2gcj(bdLon, bdLat):
"""
BD-09 转 GCJ-02
"""
x_pi = math.pi * 3000.0 / 180.0
x = bdLon - 0.0065
y = bdLat - 0.006
z = math.sqrt(x * x + y * y) - 0.00002 * math.sin(y * x_pi)
theta = math.atan2(y, x) - 0.000003 * math.cos(x * x_pi)
gcjLon = z * math.cos(theta)
gcjLat = z * math.sin(theta)
return gcjLon, gcjLat
def wgs2mercator(wgsLon, wgsLat):
"""
WGS-84 to Web mercator
mercatorLat -> y mercatorLon -> x
"""
x = wgsLon * 20037508.34 / 180.
y = math.log(math.tan((90. + wgsLat) * math.pi / 360)) / (math.pi / 180)
y = y * 20037508.34 / 180.
return x, y
def mercator2wgs(mercatorLon, mercatorLat):
"""
Web mercator to WGS-84
mercatorLat -> y mercatorLon -> x
"""
x = mercatorLon / 20037508.34 * 180
y = mercatorLat / 20037508.34 * 180
y = 180 / math.pi * (2 * math.atan(math.exp(y * math.pi / 180.)) - math.pi / 2)
return x, y
def outOfChina(lng, lat):
"""
判断是否在中国范围外
"""
if lng < 72.004 or lng > 137.8347:
return True
if lat < 0.8293 or lat > 55.8271:
return True
return False
def haversine(lon1, lat1, lon2, lat2):
"""
:param: 纬度1，经度1，纬度2，经度2（十进制度数）
:return: 二个坐标之间的距离（单位米）
Calculate the great circle distance between two points
on the earth (specified in decimal degrees)
"""
# 将十进制度数转化为弧度
lon1, lat1, lon2, lat2 = map(math.radians, [lon1, lat1, lon2, lat2])
# haversine公式
dlon = lon2 - lon1
dlat = lat2 - lat1
a = math.sin(dlat / 2) ** 2 + math.cos(lat1) * math.cos(lat2) * math.sin(dlon / 2) ** 2
c = 2 * math.asin(math.sqrt(a))
r = 6371 # 地球平均半径，单位为公里
return c * r * 1000
def wgs2bd(lon, lat):
newlon, newlat = wgs2gcj(lon, lat)
return gcj2bd(newlon, newlat)
if __name__ == '__main__':
a = [(116.32232,39.79082),
(116.328371,39.790688),
(116.329444,39.782592),
(116.322449,39.783251),
(116.32232,39.79082)]
r = []
for i in a:
lon, lat = i
lon_wgs84, lat_wgs84 = gcj2wgs_rough(lon, lat)
r.append((lon_wgs84, lat_wgs84))
print(r)
