one way roads, drawing spaced arrows

[thomas bonfort]

you're right the documentation is a bit off.
for line symbology, the rule is
GAP>0: symbols face north (or rotated wrt north by their ANGLE parameter)
GAP =0: symbol is used to 'texture' the line (useful with pixmap or
vector symbols)
GAP<0: symbol is oriented according to the line direction (this can
also be modified with the ANGLE parameter, eg to rectify an arrow
pointing 90 degrees off)

regards,
thomas

On Jan 22, 2008 7:46 PM, rich.fromm <nospam420 at yahoo.com> wrote:
> thomas bonfort wrote:
> >
> > try
> > GAP -5
> >
> > regards,
> > thomas
> >
>
> Indeed, GAP -5 preserves the angle properly, while GAP 5 does not.
>
> Is this the intended behavior, or just a workaround given some bug?  I can't
> find anything in the documentation that suggest this.  I would have thought
> that a negative gap would have flipped everything around in the opposite
> direction.
>
> From
> http://mapserver.gis.umn.edu/docs/reference/symbology/referencemanual-all-pages
>
> --- begin ---
> GAP [int]
>
>     Given in pixels. This defines a distance between symbols for TrueType
> lines. As of MapServer 5.0 this also applies to PixMap symbols.
>
>     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. A GAP of 0 (the default value) will cause MapServer
> to use the symbol as a brush to draw the line.
> --- end ---
>
> - Rich
>
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