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

[thomas bonfort]

gap in pixels = symbol->gap * style->size

On Tue, Jan 12, 2010 at 16:52, Oliver Christen <
oliver.christen at camptocamp.com> wrote:

>  GAP 20 is really giving unwanted result:
>
> http://dev.camptocamp.com/~ochriste/tilecache9.png<http://dev.camptocamp.com/%7Eochriste/tilecache9.png>
>
> though using only one style instead of two seems to solve the oval problem
> (but why ???)
>
>     style
>      symbol "dots"
>      size 8
>      color 204 102 0
>      outlinecolor  102 51 0
>     end
>
> I dont understand how GAP is supposed working:
>
> with GAP 2, I had ~10px between dots,
>  with GAP 3, I had ~18px between dots,
>  with GAP 4, I had ~26px between dots
>
> whats the logic ?
>
> ----- 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 4:36 PM
> *Subject:* Re: [mapserver-users] symbol circle (ellipse) rendered not
> round but oval
>
> symbol
>  name dots
>  type ellipse
>  points 1 1 end
>  gap 20
> end
>
> ...
>
> style
>  symbol "dots"
>  size 8
>  color r g b
>  outlinecolor  r g b
> end
>
>
>
>
> On Tue, Jan 12, 2010 at 16:31, Oliver Christen <
> oliver.christen at camptocamp.com> wrote:
>
>>  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
>>> _______________________________________________
>>> mapserver-users mailing list
>>> mapserver-users at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>
>>
>>
>
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