[MapProxy] Render lower/higher zoom levels

[Martin Kokeš]

Hello list,

is there a possibility to emulate lower or higher zoom levels from fetched WMS data? I set up my MapProxy to reproject a public WMS service:
http://geoportal.cuzk.cz/WMS_ORTOFOTO_PUB/WMService.aspx?service=WMS&request=getCapabilities

Now I'd like to render lower zoom levels from last possible zoom level, that can be fetched from WMS service. My MapProxy TMS currently serves tiles from 15 to 19. Levels 8 to 20 would be better.

Here's snip from my config:
---
layers:
  - name: cuzk_ortofoto
    title: ČÚZK Ortofoto
    sources: [cuzk_ortofoto_cache]

caches:
  cuzk_ortofoto_cache:
    grids: [GLOBAL_MERCATOR, global_geodetic_sqrt2]
    sources: [cuzk_ortofoto_wms]
    format: image/jpeg
    cache:
      type: file
      directory_layout: tms

sources:
  cuzk_ortofoto_wms:
    type: wms
    supported_srs: ['EPSG:102067']
    req:
      url: http://geoportal.cuzk.cz/WMS_ORTOFOTO_PUB/service.svc/get
      layers: GR_ORTFOTORGB
---

Martin