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

[Oliver Christen]

thank you Thomas

so if I have a dot of, for example, 8px and I want a space pf 20px between
the dots, I need a gap of 20/8 =  2.5

but as far as I can see, Mapserver doesnt like none-integer value for gap.

what should I do? :(

2010/1/12 thomas bonfort <thomas.bonfort at gmail.com>

> 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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