mapproxy.yaml

services:
  demo:
  tms:
    use_grid_names: true
    origin: 'nw'
  wmts:

layers:
  - name: combined_layer
    title: osm + osl
    sources: [combined_cache]

caches:
  combined_cache:
    meta_buffer: 0
    meta_size: [1, 1]
    grids: [webmercator]
    sources: [osm_cache, osl_cache]

  osm_cache:
    meta_buffer: 0
    meta_size: [1, 1]
    sources: [osm]
    grids: [webmercator]

  osl_cache:
    meta_buffer: 0
    meta_size: [1, 1]
    grids: [webmercator]
    sources: []
    format: custom_format
    cache:
      type: file
      directory: /mapproxy/osl/
      directory_layout: tms

sources:
  osm:
    type: tile
    grid: GLOBAL_WEBMERCATOR
    url: http://a.tile.openstreetmap.org/%(z)s/%(x)s/%(y)s.png
    transparent: true

grids:
 webmercator:
   base: GLOBAL_WEBMERCATOR

globals:
  image:
    formats:
      custom_format:
        format: image/png
        mode: P
        transparent: true