GoogleMaps.py 文件源码

def get_static_google_map(request, filename=None, crop=False):  
    response = urlfetch.fetch(request)

    # check for an error (no image at requested location)
    if response.getheader('x-staticmap-api-warning') is not None:
        return None

    try:
        img = Image.open(cStringIO.StringIO(response.content))
    except IOError:
        print "IOError:" # print error (or it may return a image showing the error"
        return None
    else:
        img = np.asarray(img.convert("RGB"))

    # there seems not to be any simple way to check for the gray error image
    # that Google throws when going above the API limit -- so here's a hack.
    if (img==224).sum() / float(img.size) > 0.95:
        return None

    # remove the Google watermark at the bottom of the image
    if crop:
        img_shape = img.shape
        img = img[:int(img_shape[0]*0.85),:int(img_shape[1]*0.85)]

    if filename is not None:
        basedir = os.path.dirname(filename)
        if not os.path.exists(basedir) and basedir not in ["","./"]:
            os.makedirs(basedir)
        io.imsave(filename, img)
    return img