[MapProxy] Getting different colors in WMS PNG layer from its Tile source

[Oliver Tonnhofer]

Hi,

I'm getting the following warnings:

% mapproxy-util serve-develop mapproxy.yaml
[2018-08-13 08:22:50,191] mapproxy.config - INFO - reading: /private/tmp/test/mapproxy.yaml
[2018-08-13 08:22:50,197] mapproxy.config - WARNING - unknown 'colors' in globals
[2018-08-13 08:22:50,197] mapproxy.config - WARNING - unknown 'paletted' in globals
[2018-08-13 08:22:50,197] mapproxy.config - WARNING - unknown 'mode' in globals
[2018-08-13 08:22:50,197] mapproxy.config - WARNING - unknown 'resampling_method' in globals


Regards,
Oliver

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







> On 9. Aug 2018, at 18:45, Jason Lee <jaslee.st at gmail.com> wrote:
> 
> Seems to be fixed with the following in my globals:
> ######################
> globals:
>     image:
>         paletted: false
> ######################
> 
> Those image format options seems to make only apply under the "image:" section!
> 
> It's frustrating that Mapproxy didn't error or warn on my initial settings.
> 
> 
> On Thu, Aug 9, 2018 at 2:02 PM Jason Lee <jaslee.st at gmail.com> wrote:
> Just to add some more details:
> 
> * I’m on the latest version of MapProxy.(1.11)
> * The image coming back from the MapProxy WMS-C service is 8-bit and as the component tiles all have slightly different pallettes, it’s perhaps no surprise that there’s a colour compromise. In this case, white turning into a exisiting pale grey.
> * In summary, I’d like to have 8-bit paletted tiles as input and 24-bit colour for WMS-C output.
> 
> 
> On Thu, Aug 9, 2018 at 1:02 PM Jason Lee <jaslee.st at gmail.com> wrote:
> Hi,
> I have a ZXY map tile service (like OSM) which we use as the source of a layer in Mapproxy. However, when I request a WMS image of this layer, I can see that the colors are not exactly the same. I have read the docs regarding color settings and here are my globals:
> 
> ######################
> globals:
>     mode: RGB
>     paletted: false
>     colors: 0
>     resampling_method: bicubic
> ######################
> 
> The source tiles are 8bit RGB where the palette is different for each tile call. And here is a screen grab with the WMS image on the left and the original Tile on the right: 
> https://pasteboard.co/HymQZnBo.png
> 
> As can be seen, the road/path feature is white in the original tile BUT is grey in the WMS image.
> 
> Any ideas?
> 
> Jason
> 
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