下载阿里云DataV.GeoAtlas的地图数据（到县级）

geoatlas_download.py

# python 3.11

import os
import json
from urllib import request
from urllib.error import HTTPError

def save_json(str,path):
    print("保存至\""+path+".json\"")
    open(path+".json","wb").write(str)

def download_json(id,path):
    print("下载 [%d]%s ..."%(id,path))
    if id%100==0:
        try:
            downloaded_str=request.urlopen("https://geo.datav.aliyun.com/areas_v3/bound/%d_full.json"%(id)).read()
            if id%10000!=0:
                save_json(downloaded_str,path)
            else:
                if not os.path.exists(path):
                    os.mkdir(path)
                gj=json.loads(downloaded_str)
                for f in gj["features"]:
                    #遍历ID和名称
                    #如果ID中间两位不是0
                    eachId=f["properties"]["adcode"]
                    eachName=f["properties"]["name"]
                    if eachName=="":
                        print("跳过空名称数据：adcode="+eachId)
                    else:
                        download_json(eachId,path+"/"+eachName)
        except HTTPError as e:#没有更详细的数据
            print("下载失败：",e.reason)
            downloaded_str=request.urlopen("https://geo.datav.aliyun.com/areas_v3/bound/%d.json"%(id)).read()
            save_json(downloaded_str,path)
    else:#已到县级
        downloaded_str=request.urlopen("https://geo.datav.aliyun.com/areas_v3/bound/%d.json"%(id)).read()
        save_json(downloaded_str,path)

download_json(100000,".")