Is there any particular way of getting the current zoom level from the map canvas through python code in QGIS environment? I want to convert coordinates of the cursor and the current zoom level into Google Map Tiles coordinates.

  • 1
    If you mean scale, you could try iface.mapCanvas().scale().
    – Joseph
    Jan 23, 2018 at 10:15
  • Thanks for your comment but is there any way I can convert scale to zoom levels? I need to put zoom levels in my URL to request tiles of the specific regions at specific zoom levels. Jan 23, 2018 at 10:23

3 Answers 3


Try using this:

import math
maxScalePerPixel = 156543.04
inchesPerMeter = 39.37
zoomlevel = int(round(math.log( ((dpi* inchesPerMeter * maxScalePerPixel) / scale), 2 ), 0))
print zoomlevel

Original code : https://github.com/datalyze-solutions/TileMapScaleLevels/blob/master/tilemapscalelevels.py


Just install tile layer plugin then add an XYZ or TMS reference to the map with the plugin you will get zoom column row information https://github.com/minorua/TileLayerPlugin/blob/master/README.md


You may also need to take account of the "tilePixelRatio". Not all retrieved images will be 256 x 256 px. Some may be 512 x 512 px with tilePixelRatio=2 and will thus have a different zoom value. I'm not sure that QGIS takes this into account anywhere.

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