（一）地理偏移

• 高德地圖：GCJ-02 坐標系（火星坐標系）
• 百度地圖：BD-09坐標系（百度坐標系）
  不同地圖定位偏移以及坐標系轉(zhuǎn)換
  可以根據(jù)公式轉(zhuǎn)換妖异，也可以用地圖產(chǎn)品的API福澡。

bd_encrypt 將 GCJ-02 坐標轉(zhuǎn)換成 BD-09 坐標缔杉， bd_decrypt 反之姑曙。

void bd_encrypt(double gg_lat, double gg_lon, double &bd_lat, double &bd_lon)
{
   double x = gg_lon, y = gg_lat;
   double z = sqrt(x * x + y * y) + 0.00002 * sin(y * x_pi);
   double theta = atan2(y, x) + 0.000003 * cos(x * x_pi);
   bd_lon = z * cos(theta) + 0.0065;
   bd_lat = z * sin(theta) + 0.006;
}

void bd_decrypt(double bd_lat, double bd_lon, double &gg_lat, double &gg_lon)
{
   double x = bd_lon - 0.0065, y = bd_lat - 0.006;
   double z = sqrt(x * x + y * y) - 0.00002 * sin(y * x_pi);
   double theta = atan2(y, x) - 0.000003 * cos(x * x_pi);
   gg_lon = z * cos(theta);
   gg_lat = z * sin(theta);
}

（二）每日限額

高德地圖10w

（三）程序

from urllib.parse import quote
from urllib import request
import json
import xlwt
import requests

amap_web_key = '9a33b151429e45ba24d1e71b55a7c282'
poi_search_url = "http://restapi.amap.com/v3/place/text"
poi_boundary_url = "https://ditu.amap.com/detail/get/detail"

# 根據(jù)城市名稱和分類關(guān)鍵字獲取poi數(shù)據(jù)
def getpois(cityname, keywords):
    i = 1
    poilist = []
    while True:  # 使用while循環(huán)不斷分頁獲取數(shù)據(jù)
        result = getpoi_page(cityname, keywords, i)
        result = json.loads(result)  # 將字符串轉(zhuǎn)換為json
        if result['count'] == '0':
            break
        poilist.extend(result['pois'])
        i = i + 1
    return poilist

# 單頁獲取pois
def getpoi_page(cityname, keywords, page):
    req_url = poi_search_url + "?key=" + amap_web_key + '&extensions=all&keywords=' + quote(
        keywords) + '&city=' + quote(cityname) + '&citylimit=true' + '&offset=25' + '&page=' + str(
        page) + '&output=json'
    data = ''
    with request.urlopen(req_url) as f:
        data = f.read()
        data = data.decode('utf-8')
    return data

# 根據(jù)id獲取邊界數(shù)據(jù)
def getBounById(id):
    req_url = poi_boundary_url + "?id=" + id
    with request.urlopen(req_url) as f:
        data = f.read()
        data = data.decode('utf-8')
        dataList = []
        datajson = json.loads(data)  # 將字符串轉(zhuǎn)換為json
        print(datajson)
        datajson = datajson['data']
        datajson = datajson['spec']
        if len(datajson) == 1:
            return dataList
        if datajson.get('mining_shape') != None:
            datajson = datajson['mining_shape']
            shape = datajson['shape']
            dataArr = shape.split(';')

            for i in dataArr:
                innerList = []
                f1 = float(i.split(',')[0])
                innerList.append(float(i.split(',')[0]))
                innerList.append(float(i.split(',')[1]))
                dataList.append(innerList)
        return dataList