[mapserver-users] symbols indexed by an attribute

[Doug Williams]

Beware: that documentation is for Version 3.3 perl mapscript.

On Wednesday 13 February 2002 11:08, Stephen Woodbridge wrote:
> http://mapserver.gis.umn.edu/mapscript.html
>
> Pushkar Pradhan wrote:
> > Thanks Steve,
> > I am now trying to built mapscript with perl, but there doesn't seem to
> > be any documentation on that. Can anyone point me if there is docum.
> > available on this, otherwise I will try to use php/mapscript?
> > I welcome suggestions and your experience from everybody about perl vs.
> > php with mapscript.
> >
> > On Tue, 12 Feb 2002, Stephen Woodbridge wrote:
> > > I think you need to use mapscript then it should not be a problem.
> > > Using mapscript implies that you build your web navigation tool using
> > > the Perl or PHP version of mapscript.
> > >
> > > -Steve
> > >
> > > Pushkar Pradhan wrote:
> > > > Hi everyone,
> > > > My team wants me to create markers, lines and shades depend. upon
> > > > particular attribs. from the shapefile.
> > > > Eg. they created an attr. Shade_sym which is a no., that no. should
> > > > be used to fetch symbol from the map file e.g. if Shade_sym = 29, the
> > > > 29th symbol from the map file must be used.
> > > > I do the foll. to accomplish the task:
> > > >    CLASSITEM 'Shade_sym'
> > > >    CLASS
> > > >      NAME "sym = 29"
> > > >      EXPRESSION ([Shade_sym] EQ 29)
> > > >      SYMBOL 29
> > > >      SIZE 2
> > > >      COLOR 114 24 124
> > > >    END
> > > > Okay I think this is the optimal way, unless any body has other
> > > > ideas. But they also want me to read COLOR AND/OR SIZE for the symbol
> > > > from a file, e.g. the foll. is such a file, the first no. being the
> > > > symbol no.: # value red green blue
> > > >
> > > > 1 255 250 250
> > > > 2 248 248 255
> > > > 3 245 245 245
> > > > 4 220 220 220
> > > > 5 255 250 240
> > > > Thus I should be able to use the attr. Shade_sym's value 29 to index
> > > > into this file and assign the RGB values to COLOR?
> > > > Is there a way to do this? I've tried to be very brief.
> > > > Thanks,
> > > > ---------------------------------------------------------------------
> > > >--------- PUSHKAR S. PRADHAN
> > > > Research Assistant
> > > > MISSISSIPPI STATE UNIVERSITY,
> > > > STARKVILLE, MS 39759.
> > > >
> > > > Engineering Research Center
> > > > Box 9627
> > > > Mississippi State, MS 39762-9627
> > > > ---------------------------------------------------------------------
> > > >---------
> >
> > -------------------------------------------------------------------------
> >----- PUSHKAR S. PRADHAN
> > Research Assistant
> > MISSISSIPPI STATE UNIVERSITY,
> > STARKVILLE, MS 39759.
> >
> > Engineering Research Center
> > Box 9627
> > Mississippi State, MS 39762-9627
> > -------------------------------------------------------------------------
> >-----