I would like to create a bunch of mbtiles. The code runs and creates the file, but it is "empty", have minimal size (16kb).

import os
import processing
from qgis.core import QgsRasterLayer

raster = QgsRasterLayer("D:/Users/lnemeth/App_MbTiles/7478.tiff", 'layer')
param_dict = {
            "INPUT": raster,
            "EXTENT": raster,

processing.run("qgis:tilesxyzmbtiles", param_dict)

EDIT: It is a raster in EPSG:31466, I realised the problem is that the layer extent returns a <QgsRectangle: 0 0, 0 0> and I don't know why. If i try manually or use the exact coordinates it works.

EDIT2: I finally calculated the extent (still dont know what was the problem, at some point it just worked), now the console says the extent is invalid if i convert it to string, if i leave it like that then the same problem happens (minimal file size, no data content).

  • 1
    Check the return value of processing.run(). And are you sure you can simply pass the raster layer as extent? Commented Jun 27, 2023 at 13:18
  • @bugmenot123 I tried using the current extent, even calculate with a separate line of the code and it returns <QgsRectangle: 0 0, 0 0>, it might be the problem but I don't know why is it like this. If i do manually and use the correct values of an extent it works but as i put into the a script with the same parameters it only works when I specify the coordinates, otherwise the extent just returns those 4 zeroes. Commented Jun 27, 2023 at 14:00
  • 1
    If you create a new QGIS project, use a OSM background and load your raster file, does it display at the correct location? Commented Jun 27, 2023 at 14:19
  • 1
    @bugmenot123 Yes it does. Commented Jun 27, 2023 at 14:22

1 Answer 1


I solved by changing the raster layer's loading method to iface.addRasterLayer(), now it creates the correct, not empty mbtiles.

Also I later encountered another bug, but it was solved by using older QGIS version (3.16).

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