[MapProxy] color depth reduction

Sandor Csaba sandor.csaba at viamap.hu
Tue Jul 9 08:24:03 PDT 2013


Thanks for that!

In png even if I set the parameters you suggested the colors still not OK,
but when i switch to jpeg it is nice. So I will use jpeg format.

Thanks again,
Csaba


On 9 July 2013 09:28, Martin Kokeš <shr3k at typo3-hosting.com> wrote:

> **
> I meant that for aerial imagery would be better to use a image/jpeg format:
> ---
>   Ortho_romai_sztendre2_cache:
>     ...
>     image:
>       format: image/jpeg
>       resampling_method: bilinear
>       encoding_options:
>         jpeg_quality: 85
> ---
> Martin
>
> ------------------------------
> *From:* Sandor Csaba [mailto:sandor.csaba at viamap.hu]
> *To:* martin at tuningmedia.cz
> *Cc:* mapproxy at lists.osgeo.org [mailto:mapproxy at lists.osgeo.org]
> *Sent:* Tue, 09 Jul 2013 08:55:43 +0200
> *Subject:* Re: [MapProxy] color depth reduction
>
>
> Hi Martin,
>
> Thanks for the info.
>
> Here's my cache setting:
>
>   Ortho_romai_sztendre2_cache:
>     meta_buffer: 20
>     meta_size: [5, 5]
>     format: image/png
>     request_format: image/png
>     link_single_color_images: true
>     grids: [Ortho_romai_sztendre2_grid]
>     sources: [Ortho_romai_sztendre_source]
>     watermark:
>       text: fototerkep.hu
>     cache:
>       type: mbtiles
>       filename: /home/viamap/tilecache/Ortho_romai_sztendre2.mbtiles
>
>
> And the image/png setting from globals/image:
>
>   image:
>       formats:
>         image/png:
>           mode: RGBA
>           transparent: true
>           resampling_method: bilinear
>
> I  notice the difference in resampling method and the colors: 0 and
> transparent: false
>
> I'll try these settings.
>
> Can you explain your remark using png for aerial images?
>
> Thanks a lot,
> Csaba
>
>
>
>
> On 8 July 2013 15:34, Martin Kokeš <shr3k at typo3-hosting.com> wrote:
>
>> **
>> Hi Csaba,
>>
>> It's shame you don't post your yaml, but I suggest:
>>
>> globals:
>>   image:
>>     formats:
>>       png24:
>>         format: image/png
>>         mode: RGBA
>>         colors: 0
>>         transparent: false
>>         resampling_method: bicubic
>>
>> And use this image format in your cache settings.
>>
>> BTW are you using PNG format for air/satellite imagery consciously?
>>
>> Martin
>>
>> *From:* Sandor Csaba [mailto:sandor.csaba at viamap.hu]
>> *To:* mapproxy at lists.osgeo.org [mailto:mapproxy at lists.osgeo.org]
>> *Sent:* Mon, 08 Jul 2013 15:20:36 +0200
>> *Subject:* [MapProxy] color depth reduction
>>
>>
>> Hi List,
>>
>> Do you have any thoughts on the color degradation experienced here:
>>
>> http://map.fototerkep.hu/arviz/index.html?x=355676.5&y=5281953.375&zoom=8
>>
>> See the swimming pool's blue color transition.
>>
>> Any suggestions setting the image properties?
>>
>> On the original geotiffs the color transition is smooth.
>>
>> http://webmap.viamap.hu/upload/ortho_tiff_comp.jpg
>>
>> Thanks,
>> Csaba
>>
>> --
>> Sándor Csaba
>> szolgáltatási vezető
>> ViaMap Kft.
>> Székhely/postacím: 2176 Erdőkürt, Téglaház utca 4.
>>
>> Iroda:
>> 1076 Budapest, Garay u. 29-31. I. 1.
>> (EMLA Környezeti Management és Jog Egyesület)
>>
>>
>> Tel: +3630/9605853
>> Fax: +3617002542
>>
>>
>> _______________________________________________
>> MapProxy mailing list
>> MapProxy at lists.osgeo.org
>> http://lists.osgeo.org/mailman/listinfo/mapproxy
>>
>>
>
>
> --
> Sándor Csaba
> szolgáltatási vezető
> ViaMap Kft.
> Székhely/postacím: 2176 Erdőkürt, Téglaház utca 4.
>
> Iroda:
> 1076 Budapest, Garay u. 29-31. I. 1.
> (EMLA Környezeti Management és Jog Egyesület)
>
>
> Tel: +3630/9605853
> Fax: +3617002542
>
>
> _______________________________________________
> MapProxy mailing list
> MapProxy at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/mapproxy
>
>


-- 
Sándor Csaba
szolgáltatási vezető
ViaMap Kft.
Székhely/postacím: 2176 Erdőkürt, Téglaház utca 4.

Iroda:
1076 Budapest, Garay u. 29-31. I. 1.
(EMLA Környezeti Management és Jog Egyesület)


Tel: +3630/9605853
Fax: +3617002542
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