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

[Jason Lee]

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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