I am using Leaflet vectorgrid plugin with a folder of .pbf files(created from a .mbtiles file using mbutil) to load a map using Apache server.However,when I load the map on the browser,I take this error:

leaflet.vectorgrid@1.3.0:1 Uncaught Error: Unimplemented type: 6
at Pbf.skip (leaflet.vectorgrid@1.3.0:1:16761)
at Pbf.readFields (leaflet.vectorgrid@1.3.0:1:14113)
at new VectorTile$1 (leaflet.vectorgrid@1.3.0:1:5519)
at FileReader.<anonymous> (leaflet.vectorgrid@1.3.0:1:31611)

I found similar errors to be appear due to the fact that .pbf files are gzipped and the browser doesn't know it,when trying to process them. It is suggested to add a .htaccess file inside the .pbf folder,using this code:

<Files "*.pbf">
Header set Content-Encoding: gzip

so as Apache tells the browser that the files are gzipped,so as to uncompress them. However,it doesn't work for me,I still take the above error message.

What else should I try?

  • Did you check if those .pbf files are actually gzipped? If they are, you could create .pbf files that are not gzipped and try with those.
    – TomazicM
    Mar 10 at 9:59
  • How can I check if they are gzipped?The extension of the files is .pbf,so I am not sure if they are gzipped or not.
    – sokratis
    Mar 10 at 10:34
  • I run the "file" command to a file and the result is:"0.pbf: PNG image data, 256 x 256, 8-bit/color RGBA, non-interlaced ",so I think they are not gzipped..
    – sokratis
    Mar 10 at 10:40
  • This means your tiles are standard raster tiles of image type PNG, so you should use standard Leaflet L.tileLayer layer.
    – TomazicM
    Mar 10 at 11:02
  • This is correct,I used the L.tileLayer command and error disappeared.Thanks for the help,really appreciate.
    – sokratis
    Mar 10 at 11:52

1 Answer 1


I found the issue,the .pbf were raster tiles (created by mbutil),where the function I used waited vector tiles(L.VectorGrid.Protobuf).To solve this issue,I used the L.tileLayer function.Another solution would be to convert the tile files to vector tiles so as to use the L.VectorGrid.Protobuf function.

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