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python - 如何将 .TIF 转换为 GeoTiFF

问题描述

我正在使用一个功能来下载谷歌地图图像给定一对区域的纬度和经度。我可以设法将下载图像的格式更改为 jpeg 或 png 或 tiff 但我想将图像保存为 Geotiff 以保留空间信息。有没有办法做到这一点？就像输入现有图像，然后输入我想要转换的格式。这是代码

def __init__(self, lat, lng, zoom=12, layer='s'):

    self._lat = lat
    self._lng = lng
    self._zoom = zoom
    self._layer = layer

def getXY(self):


    tile_size = 256

    numTiles = 2 << self._zoom

    # Find the x_point given the longitude
    point_x = (tile_size / 2 + self._lng * tile_size / 360.0) * numTiles // tile_size

    # Convert the latitude to radians and take the sine
    sin_y = math.sin(self._lat * (math.pi / 180.0))

    # Calulate the y coorindate
    point_y = ((tile_size / 2) + 0.5 * math.log((1 + sin_y) / (1 - sin_y)) * -(
    tile_size / (2 * math.pi))) * numTiles // tile_size

    return int(point_x), int(point_y)

def generateTiles(self, **kwargs):


    start_x = kwargs.get('start_x', None)
    start_y = kwargs.get('start_y', None)
    tile_width = kwargs.get('tile_width', 5)
    tile_height = kwargs.get('tile_height', 5)

    # Check that we have x and y tile coordinates
    if start_x == None or start_y == None:
        start_x, start_y = self.getXY()

    # Determine the size of the image
    width, height = 256 * tile_width, 256 * tile_height

    # Create a new image of the size require
    map_img = Image.new('RGB', (width, height))

    for x in range(0, tile_width):
        for y in range(0, tile_height):
            url = f'https://mt0.google.com/vt?lyrs={self._layer}&x=' + str(start_x + x) + '&y=' + str(start_y + y) + '&z=' + str(self._zoom)
            current_tile = str(x) + '-' + str(y)
            urllib.request.urlretrieve(url, current_tile)

            im = Image.open(current_tile)
            map_img.paste(im, (x * 256, y * 256))

            os.remove(current_tile) 
            

            current_tile = str(x) + '-' + str(y)
            urllib.request.urlretrieve(url, current_tile)

            im = Image.open(current_tile)
            map_img.paste(im, (x * 256, y * 256))

            os.remove(current_tile)

        return map_img

def main():
    gmd = ImagesDownloader(lat, lon, 15, layer ='s')

print("The tile coorindates are {}".format(gmd.getXY()))

try:
    # Get the high resolution image
    img = gmd.generateTiles()
except IOError:
    print("Could not generate the image - try adjusting the zoom level and checking your coordinates")
else:
    # Save the image to disk
    img.save("high_resolution_image.tif")
    print("The map has successfully been created")


if __name__ == '__main__':  main()

标签： pythongoogle-mapsbing-mapsgeotiff

解决方案

我建议使用 GDAL 创建 GeoTiff。如果您正在使用 Python 绑定，则可以使用它。https://gdal.org/api/python.html您可能需要查看地图服务的使用条款，通常不允许导出和保存图像。

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