Unable to render raster type PM Tiles from offline .pmtiles file

[navisinghnz9]

I am trying to render raster type PM Tiles from offline .pmtiles file in Qt c++ application.

I am seeing a blank screen

However, I am able to render vector type PM Tiles from offline .pmtiles file in the Qt c++ application.

I was wondering if there is any example of rendering .pmtiles of raster types - from https:// and file:// sources.

Not sure if this is a bug in the maplibre-native.

[tdcosta100]

Hi, @navisinghnz9. Do you have a sample raster .pmtiles file, so we can reproduce your issue?

[navisinghnz9]

Hi @tdcosta100

I am attaching the sample file here. Attached the file as .zip, pls unzip it.

region_8653_combined_shaded_relief.zip

[tdcosta100]

It worked here for me:

I used this style:

{
  "version": 8,
  "id": "pmtiles-test",
  "name": "PMTiles Test",
  "sources": {
    "raster_tiles": {
      "maxzoom": 20,
      "tileSize": 256,
      "type": "raster",
      "url": "pmtiles://file://<pmtiles directory>/region_8653_combined_shaded_relief.pmtiles"
    }
  },
  "layers": [
    {
      "id": "background",
      "type": "background",
      "paint": {"background-color": "rgb(128,128,128)"}
    },
    {
      "id": "raster_tiles",
      "type": "raster",
      "source": "raster_tiles",
      "maxzoom": 20
    }
  ]
}

And this command line (in Windows):

mbgl-render.exe --style file://<style directory>/pmtiles_test.json --lon=152.25 --lat=-23.2502 --zoom=10 --output out.png

Of course you have to replace the <pmtiles directory> and <style directory> with the actual path of your files.

[navisinghnz9]

@tdcosta100 Thank you very much!

I have tested this working with maplibre-native on my side.
I was wondering when this will be supported in the maplibre-native-qt SDK as well.

(Just checked, the "main" of maplibe-native inside maplibre-native-qt/vendor/ is quite behind in the commit history at "0a4e5a4")

Thanks