[mapserver-users] Problem using WMS GetFeatureInfo in OpenLayers with different projections

Fri Feb 14 01:32:03 PST 2014

Hi,

That's great to hear. I could not make up any new things for you to test, except to ask if you were using always the same request for testing. X=2&Y=100 can maybe lead to a situation where the search window that Mapserver builds would not cover the actual pixel but this was only consideration without real knowledge. I based it on what I understood from this recent RFC http://mapserver.org/development/rfc/ms-rfc-107.html

-Jukka Rahkonen-

Dejan Gambin wrote:

> 
> I've upgraded to 6.4 and seems fine now
> 
> 
> On 13. vel. 2014., at 16:09, Rahkonen Jukka (Tike) wrote:
> 
> > Hi,
> >
> > Just to eliminate one possibility, is the result the same if you use one DEM
> raster as a source instead of tileindex?
> >
> > -Jukka Rahkonen-
> >
> > Dejan Gambin wrote:
> >
> >> Since I didn't solve this yet, do you think it could be a bug and/or
> >> should I try with some newer MapServer version? I am currently using
> >> 6.0.3
> >>
> >> Thx
> >>
> >> Dejan Gambin
> >>
> >> On 22. sij. 2014., at 10:35, Dejan Gambin wrote:
> >>
> >>> Sorry for being late...
> >>>
> >>> So, I have tested it all with browser of course. Here are some
> >>> working and
> >> non-working requests:
> >>>
> >>> Mapfile part:
> >>>
> >>> PROJECTION
> >>>   "init=epsg:4326"
> >>> END
> >>> METADATA
> >>>   "wms_srs"   "EPSG:4326"
> >>>   "wms_title"  "aster_dem"
> >>>   "gml_include_items" "value_0"
> >>>   "gml_value_0_alias" "Nadmorska_visina"
> >>> END
> >>> TILEINDEX "../aster/aster_index"  #original raster in 4326
> >>>
> >>>
> >>> Working GetMap request in 900913:
> >>>
> >>> http://mydomain.com/cgi-
> >> bin/mywms/?SERVICE=WMS&VERSION=1.1.1&REQUEST=G
> >>>
> >>
> etMap&LAYERS=aster_dem_info&STYLES=&SRS=EPSG:900913&FORMAT=image
> >> /png&W
> >>>
> >>
> IDTH=400&HEIGHT=300&BBOX=1496080.301904,5576310.226428,1593919.698
> >> 096,
> >>> 5649689.773572
> >>>
> >>> Non-working GetFeatureInfo request in 900913:
> >>>
> >>> http://mydomain.com/cgi-
> >> bin/mywms/?SERVICE=WMS&VERSION=1.1.1&REQUEST=G
> >>>
> >>
> etFeatureInfo&LAYERS=aster_dem_info&STYLES=&SRS=EPSG:900913&FORMAT
> >> =ima
> >>>
> >>
> ge/png&WIDTH=400&HEIGHT=300&BBOX=1496080.301904,5576310.226428,1
> >> 593919
> >>>
> >>
> .698096,5649689.773572&QUERY_LAYERS=aster_dem_info&INFO_FORMAT=g
> >> ml&X=2
> >>> 00&Y=100
> >>>
> >>> Working GetMap request in 4326:
> >>>
> >>> http://mydomain.com/cgi-
> >> bin/mywms/?SERVICE=WMS&VERSION=1.1.1&REQUEST=G
> >>>
> >>
> etMap&LAYERS=aster_dem_info&STYLES=&SRS=EPSG:4326&FORMAT=image/p
> >> ng&WID
> >>> TH=400&HEIGHT=300&BBOX=13.439518,44.712096,14.318424,45.178647
> >>>
> >>> Working GetFeatureInfo request in 4326:
> >>>
> >>> http://mydomain.com/cgi-
> >> bin/mywms/?SERVICE=WMS&VERSION=1.1.1&REQUEST=G
> >>>
> >>
> etFeatureInfo&LAYERS=aster_dem_info&STYLES=&SRS=EPSG:4326&FORMAT=i
> >> mage
> >>>
> >>
> /png&WIDTH=400&HEIGHT=300&BBOX=13.439518,44.712096,14.318424,45.17
> >> 8647
> >>> &QUERY_LAYERS=aster_dem_info&INFO_FORMAT=gml&X=200&Y=100
> >>>
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> On 17. sij. 2014., at 13:52, Rahkonen Jukka (Tike) wrote:
> >>>
> >>>> Hi,
> >>>>
> >>>> Please show us the complete GetFeatureInfo requests for both cases.
> >>>> Server
> >> urls are not interesting but all the WMS parameters. Have you already
> >> tried to send them from browser? Testing with OpenLayers is waste of
> >> time because you can't control what really happens but with hand
> >> written requests you are the master.
> >>>>
> >>>> -Jukka Rahkonen-
> >>>>
> >>>>
> >>>> Lars Lingner wrote:
> >>>>>
> >>>>> On 17.01.2014 11:10, Dejan Gambin wrote:
> >>>>>>> What is the mywms? MapServer binary, wrapper script, ...?
> >>>>>> wrapper script. Something like:
> >>>>>>
> >>>>>> #! /bin/sh MS_MAPFILE=/path_to_my_map_file export MS_MAPFILE
> >>>>>> /usr/lib/cgi-bin/mapserv6
> >>>>>>
> >>>>>
> >>>>> AFAIK nothing wrong here.
> >>>>>
> >>>>>>>
> >>>>>>> Did you check the actual requests? Does the bbox parameter fit
> >>>>>>> to the srs? Could you compare a working GetFeatureInfo request
> >>>>>>> in
> >>>>>>> 900913 with a failing one in 4326?
> >>>>>> Yes, bbox parameter fits to srs in both cases. So, if I put
> >>>>>> bbox/srs params in 426 everything works, if I put them in 900913
> >>>>>> then error happens
> >>>>>
> >>>>> Does other maps work with 900913?
> >>>>>
> >>>>> I would check which pro4 epsg file mapserver is using, check if
> >>>>> there is a definition for 90013 and if it looks like
> >>>>>
> >>>>> +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0
> >>>>> ++y_0=0
> >>>>> +k=1.0 +units=m +nadgrids=@null +wktext  +no_defs
> >>>>>
> >>>>> On the other hand, if GetMap ist working fine, projection
> >>>>> definition should be fine too. Just thinking out loud...
> >>>>>
> >>>>>
> >>>>>>>
> >>>>>>> Raise the debug level to 3 at map level and layer level. You can
> >>>>>>> let MapServer write its own error logfile, so your apache log
> >>>>>>> stays clean.
> >>>>>
> >>>>> Could you find anything in the MapServer log file?
> >>>>>
> >>>>> Here I would identify a working 4326 GFI request and compare the
> >>>>> corresponding log with a 900913 request. There should be a difference.
> >>>>>
> >>>>>
> >>>>> Best wishes,
> >>>>>
> >>>>> Lars
> >>>>>
> >>>>> _______________________________________________
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