download_weather_satellite.py

### download Taiwan Weather Satellite (.jpg)
# usage: python download_weather_satellite.py 2020-01-18
import os
import sys
import ssl
import urllib.request
ssl._create_default_https_context = ssl._create_unverified_context
import urllib.request
import cv2


date_txt = sys.argv[1] # 2020-01-18
data_path = "datasets/weather/satellite/"+date_txt+"/"

if not os.path.exists(data_path):
    os.makedirs(data_path)

# Taiwan weather satellite (TRGB) https://www.cwb.gov.tw/Data/satellite/TWI_VIS_TRGB_1375/TWI_VIS_TRGB_1375-2020-01-14-07-00.jpg
satellite_trgb_url = "https://www.cwb.gov.tw/Data/satellite/TWI_VIS_TRGB_1375/TWI_VIS_TRGB_1375"


for h in range (24):
    if h<10: 
        h_txt = "0"+str(h)
    else:
        h_txt = str(h)
    for m in range(0,60,10):
        if m==0: 
            m_txt="00"
        else:
            m_txt=str(m)
        file_name = date_txt +"-"+h_txt+"-"+m_txt+".jpg"
        imgURL = satellite_trgb_url+"-"+file_name
        print(imgURL)
        try: 
            urllib.request.urlretrieve(imgURL, data_path+file_name)		
        except: # download previous satellite image if the current image file does not exist
            print("file can not be downloaded !!!")