Python 3.7.11 : My colab tutorials - part 015.

Google Maps explicitly forbid using map tiles offline or caching them, but I think Microsoft Bing Maps don't say anything explicitly against it, and I guess you are not planning to use your program commercially (?)

This colab notebook show you how to get a title from tiles.virtualearth.net.

The source code is simple:

class TileServer(object):
    def __init__(self):
        self.imagedict = {}
        self.mydict = {}
        self.layers = 'ROADMAP'
        self.path = './'
        self.urlTemplate = 'http://ecn.t{4}.tiles.virtualearth.net/tiles/{3}{5}?g=0'
        self.layerdict = {'SATELLITE': 'a', 'HYBRID': 'h', 'ROADMAP': 'r'}

    def tiletoquadkey(self, xi, yi, z, layers):
        quadKey = ''
        for i in range(z, 0, -1):
            digit = 0
            mask = 1 << (i - 1)
            if(xi & mask) != 0:
                digit += 1
            if(yi & mask) != 0:
                digit += 2
            quadKey += str(digit)
        return quadKey

    def loadimage(self, fullname, tilekey):
        im = Image.open(fullname)
        self.imagedict[tilekey] = im
        return self.imagedict[tilekey]

    def tile_as_image(self, xi, yi, zoom):
        tilekey = (xi, yi, zoom)
        result = None
        try:
            result = self.imagedict[tilekey]
            print(result)
        except:
            print(self.layers)
            filename = '{}_{}_{}_{}.jpg'.format(zoom, xi, yi, self.layerdict[self.layers])
            print("filename is " + filename)
            fullname = self.path + filename
            try:
                result = self.loadimage(fullname, tilekey)
            except:
                server = random.choice(range(1,4))
                quadkey = self.tiletoquadkey(*tilekey)
                print (quadkey)
                url = self.urlTemplate.format(xi, yi, zoom, self.layerdict[self.layers], server, quadkey)
                print ("Downloading tile %s to local cache." % filename)
                urllib.request.urlretrieve(url, fullname)
                #urllib.urlretrieve(url, fullname)
                result = self.loadimage(fullname, tilekey)
        return result