[mapserver-users] Negative GAP parameter to rotate vector symbols along line

[Bartłomiej Burkot]

Any idea why it doesn't work?

> Hi thomas
>> what mapserver version?
>> what outputformat/renderer?
> MapServer version 5.6.5
>
> OUTPUTFORMAT
>       NAME gif
>       DRIVER "GD/GIF"
>       MIMETYPE "image/gif"
>       IMAGEMODE PC256
>       EXTENSION "gif"
>     END
>
> Bartek
>
>> -- 
>> thomas
>>
>> On Wed, Mar 30, 2011 at 15:10, Bartłomiej Burkot
>> <pomiarowiec10 at poczta.onet.pl>  wrote:
>>> Hi Users
>>>
>>> I would like to render a vector symbol along the line in a layer. This
>>> vector symbol should be rotated according to orientation of 
>>> linesegments
>>> (for example a arrow along one way street). When I use negative GAP 
>>> with
>>> truetype symbol it work perfectly but I have probelms with vector 
>>> symbols to
>>> rotate them.
>>>
>>> I use this definition of Symbol but it doesn't work:
>>>
>>> SYMBOL
>>>      NAME "testsymbol"
>>>     TYPE VECTOR
>>>    POINTS
>>>      5 0
>>>      2 1
>>>      0 2.5
>>>      2 4
>>>      5 5
>>>      5 5
>>>      2 6
>>>      0 7.5
>>>      2 9
>>>      5 10
>>>    END
>>>      STYLE 1 8 1 18 END
>>>      GAP -99 # doesn't work
>>> END
>>>
>>> I read in docu http://mapserver.org/mapfile/symbol.html that:
>>>
>>> "When drawing the symbol along a line segment, a negative GAP will 
>>> will add
>>> 180 degress to the angle. The TrueType and PixMap symbols are always
>>> oriented along the line."
>>>
>>> My layer definiton is:
>>>
>>> LAYER
>>>    NAME testtest
>>>    STATUS on
>>>    TYPE line
>>>    TRANSFORM false
>>>    FEATURE
>>>      WKT "LINESTRING (0 0, 100 100, 0 100)"
>>>    END
>>>    CLASS
>>>
>>>      STYLE
>>>          #ANGLE AUTO
>>>          SYMBOL "testsymbol"
>>>          COLOR 0 255 0
>>>          #SIZE    8
>>>      END
>>>    END
>>> END
>>>
>>> Does vectorsymbol play with negative GAP parameter?
>>> Bartek
>>>
>>>
>>>
>>>
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>>> mapserver-users at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/mapserver-users
>>>
>>>
>
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