[MapProxy] WMS EPSG:102067 reprojection problem

[Oliver Tonnhofer]

On 29.12.2011, at 01:28, Martin Kokeš wrote:
> I get in source-requests.log request like this:
> http://geoportal.cuzk.cz/WMS_ORTOFOTO_PUB/service.svc/get?styles=&format=image%2Fpng&height=1184
> &bbox=-22072429.9911,-40399557.4804,-22058115.041,-40385241.7224&layers=GR_ORTFOTORGB&crs=EPSG%3A102067&service=WMS&request=Ge
> tMap&width=1184&version=1.3.0

What request are you sending to MapProxy? MapProxy cannot guess the BBOX of your service, so you need to set it with the coverage option. Otherwise MapProxy uses the complete world as the BBOX and you won't see anything in the demo service or in most GIS (zoom to layer).


> As you see, bbox is somehow wrong.
> 
> I have /usr/share/proj/epsg with correct EPSG:102067 definition:
> # S-JTSK Krovak East North
> <102067> +proj=krovak +lat_0=49.5 +lon_0=24.83333333333333 +alpha=30.28813972222222 +k=0.9999 +x_0=0 +y_0=0 +ellps=bessel +pm=greenwich +units=m +no_defs <>
> 
> One reference point transformation is correct:
> echo "-868208.53 -1095793.57 512.30" | cs2cs +init=esri:102067 \
> +towgs84=570.8,85.7,462.8,4.998,1.587,5.261,3.56 +to +init=epsg:4326
> 
> 12d48'25.16"E 49d27'8.146"N 559.261

You need to add the towgs84 parameters to your proj4 definition if you need them for correct transformation in MapProxy.


Regards,
Oliver

-- 
Oliver Tonnhofer    | Omniscale GmbH & Co KG    | http://omniscale.de
http://mapproxy.org | https://bitbucket.org/olt | @oltonn