[mapserver-users] symbol circle (ellipse) rendered not round but oval

[Oliver Christen]

hi David

Im requesting the image through wms indeed.
Though the bbox x/y ratio is exactly the same as the image x/y.
I tried to request the same image directly in cgi, sadely I get exactly the
same problem:

image result in cgi: http://dev.camptocamp.com/~ochriste/cgi.png

(as compared to the wms image http://dev.camptocamp.com/~ochriste/wms.png)

this is the cgi request I used:
/usr/lib/cgi-bin/mapserv -nh
"QUERY_STRING=map=/var/www/veloland/private/veloland/veloland/wms/veloland.map&mode=map&LAYERS=MtblandRoutenNational&mapext=556960+220720+557600+221360&mapsize=256+256"
> cgi.png

I used exactly the same bbox and image size as the wms request:

/wms?FORMAT=image%2Fpng&LAYERS=MtblandRoutenNational&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A21781&BBOX=556960,220720,557600,221360&WIDTH=256&HEIGHT=256

this is when using STYLE 1 20 END or PATTERN 1 20 END for the symbol

when using GAP  the dots are correctly shaped

so I suspect the problem is within the interpretation of STYLE/PATTERN for
the symbol generation ?


2010/1/12 Fawcett, David (MPCA) <David.Fawcett at state.mn.us>

>  Are you requesting your image through a WMS and maybe getting a
> ‘non-square pixel’ effect?
>
>
>
> If you are using WMS, are the symbols round when you do a cgi request in
> mode=map or mode=tile?
>
>
>
> David.
>
>
>
> *From:* mapserver-users-bounces at lists.osgeo.org [mailto:
> mapserver-users-bounces at lists.osgeo.org] *On Behalf Of *Oliver Christen
> *Sent:* Tuesday, January 12, 2010 9:31 AM
> *To:* thomas bonfort
>
> *Cc:* mapserver-users at lists.osgeo.org
> *Subject:* Re: [mapserver-users] symbol circle (ellipse) rendered not
> round but oval
>
>
>
> Hi Thomas :)
>
>
>
> thanks for the answer, but sadely it didnt solve my problem:
>
>
>
> here are a few tests I did:
>
>
>
> using GAP 20 gave me really weird result:
>
> http://dev.camptocamp.com/~ochriste/tilecache6_gap_20.png<http://dev.camptocamp.com/%7Eochriste/tilecache6_gap_20.png>
>
>
>
> using PATTERN 1 22 END gave me better result, but the dot are still
> slightly oval:
>
> http://dev.camptocamp.com/~ochriste/tilecache7_pattern.png<http://dev.camptocamp.com/%7Eochriste/tilecache7_pattern.png>
>
>
>
> I wondered if the visual effect may have come from the fact im pilling up
> two circle one over the other, but even when trying to display only the
> outer or inner circles, the circle are still slightly off:
>
> http://dev.camptocamp.com/~ochriste/tilecache4_outercircle.png<http://dev.camptocamp.com/%7Eochriste/tilecache4_outercircle.png>
>
> http://dev.camptocamp.com/~ochriste/tilecache5_innercircle.png<http://dev.camptocamp.com/%7Eochriste/tilecache5_innercircle.png>
>
> (both at once
> http://dev.camptocamp.com/~ochriste/tilecache3_bothcircle.png<http://dev.camptocamp.com/%7Eochriste/tilecache3_bothcircle.png>
> )
>
>
>
> any other idea? ^_^
>
>  ----- Original Message -----
>
> *From:* thomas bonfort <thomas.bonfort at gmail.com>
>
> *To:* Oliver Christen <oliver.christen at camptocamp.com>
>
> *Cc:* mapserver-users at lists.osgeo.org
>
> *Sent:* Tuesday, January 12, 2010 3:18 PM
>
> *Subject:* Re: [mapserver-users] symbol circle (ellipse) rendered not
> round but oval
>
>
>
> hi Oliver :)
>
> try with GAP 20 instead of STYLE 1 20 END (which is deprecated btw, use
> PATTERN now)
>
> cheers,
> thomas
>
> On Tue, Jan 12, 2010 at 15:04, Oliver Christen <
> oliver.christen at camptocamp.com> wrote:
>
> hello
>
> I have a weird problem with symbology.
> Im rendering a line with dots, but the dots are not round but slightly
> oval, see image http://dev.camptocamp.com/~ochriste/tilecache.png<http://dev.camptocamp.com/%7Eochriste/tilecache.png>
>
> Any idea what could be the cause ?
>
> Here is my symbol definition:
>
> SYMBOL
>  NAME "linie-gepunkt10"
>  TYPE ELLIPSE
>  POINTS
>   1 1
>  END
>  STYLE
>   1 20
>  END
>  FILLED TRUE
> END
>
> and my layer's class definition:
>
>  CLASS
>   EXPRESSION "3"
>   MAXSCALEDENOM 200001
>   STYLE
>     SYMBOL "linie-gepunkt10"
>     SIZE 10
>     COLOR 102 51 0
>   END
>   STYLE
>     SYMBOL "linie-gepunkt10"
>     SIZE 8
>     COLOR 204 102 0
>   END
>  END
>
> and the map outputformat:
>
> OUTPUTFORMAT
>  NAME png
>  DRIVER "AGG/PNG"
>  MIMETYPE "image/png"
>  IMAGEMODE RGBA
>  EXTENSION "png"
>  FORMATOPTION "INTERLACE=OFF"
> END
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>
>
>
>
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