[MapProxy] Layer merging problem

[Oliver Tonnhofer]

Hi,

opacity is an old and somewhat limited feature that was never really extended.
https://mapproxy.org/docs/nightly/configuration.html?highlight=opacity#options
So yes, it is likely that it does not work for all use-cases. 


Regards,
Oliver

-- 
Oliver Tonnhofer  | Omniscale GmbH & Co KG  | https://omniscale.com
OpenStreetMap WMS and tile services         | https://maps.omniscale.com





> On 21.03.2017, at 12:03, deduikertjes <deduikertjes at xs4all.nl> wrote:
> 
> Layer merging problem
> 
> Hi List,
> 
> When (vertically) merging layers (mapproxy 1.9) results are not as expected.
> 
> Merging two layers which have fully transparent areas show only the topmost layer. The bottom layer is not shown as should (not at all).
> If the top layer has no fully transparent areas but is completely opaque and opacity is set to eg 0.8 the bottom layer is shown as should. 
> 
> Did I make a config error or did I run into a bug?
> 
> Any help greatly appreciated, MArco
> 
> An excerpt from my config:
> 
> services:
>   tms:
>     # needs no arguments
>   wms:
>     srs: ['EPSG:28992']
>     image_formats: ['image/png', 'png']
> 
> globals:
>   cache:
>     minimize_meta_requests: true
>     meta_size: [1, 1]
>     meta_buffer: 0
>     
>   image:
>     paletted: false
>     formats:
>       image/png:
>         mode: RGBA
>         transparent: true
> 
> sources:
>   wms_source1:
>     type: wms
>     wms_opts: 
>       featureinfo: true
>       legendgraphic: true
>     supported_srs: ['EPSG:28992']
>     req:
>       url: 'http://myservice.nl/geoserver/gwc/service/wms?'
>       layers: 'layer1'
>       transparent: true
> 
>   wms_source2:
>     type: wms
>     wms_opts: 
>       featureinfo: true
>       legendgraphic: true
>     supported_srs: ['EPSG:28992']
>     req:
>       url: 'http://myservice.nl/geoserver/gwc/service/wms?'
>       layers: 'layer2'
>       transparent: true
> 
> caches:
>   _source1:
>      sources: [wms_source1]
>      link_single_color_images: true
>      disable_storage: true
>      image: {opacity: 0.8}
> 
>   _source2:
>      sources: [wms_source2]
>      link_single_color_images: true
>      disable_storage: true
>      image: {opacity: 0.8}
> 
> layers:
> 
>   - name: 'layer1'
>     sources: [_source1]
>     title: 'layer 1'
> 
> 
>   - name: 'layer2'
>     sources: [_source2]
>     title: 'Layer 2'
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