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

[thomas bonfort]

what mapserver version?
what outputformat/renderer?

--
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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