[MapProxy] High-dpi tiles from tileserver-gl

[Matthias Woltering]

Hi all,

I would like to fetch high-dpi tiles from tileserver-gl via mapproxy. To 
get retina-tiles you have to add "@2x" or "@3x" to the tile-url:

low-res-url:
http://my-tileserver-gl/styles/osm/10/1075/1342.png

retina-url:
http://my-tileserver-gl/styles/osm/10/1075/1342@2x.png

see: 
<http://tileserver.readthedocs.io/en/latest/endpoints.html#static-images>

I tried to add the string "@2x" to the template, but no luck.

configuration:
==============
sources:
   my_tile_source_highdpi:
     type: tile
     grid: webmercator_hq
     url: http://my-tileserver-gl/styles/osm/%(z)s/%(x)s/%(y)s at 2x.png

grids:
     webmercator:
         base: GLOBAL_WEBMERCATOR
     webmercator_hq:
         srs: "EPSG:3857"
         origin: nw
         min_res: 78271.51696402048
         tile_size: [512, 512]

error:
======
mapproxy.source.tile - WARNING - could not retrieve tile: No response 
from URL "http://2x.png": Name or service not known

I also tried to escape the "@", but also no luck.

Do I have to change the class  TileURLTemplate in client/tile.py? Or is 
there a simpler method to solve the problem i.e. via configuration?

Thanks for your help!


Matthias Woltering