Polygon Buffer Query

[Abe Gillespie]

How would one go about adding the units argument?

Thanks.
-Abe

On 9/7/05, Lowell Filak <lfilak at medinaco.org> wrote:
> The following message was sent by Abe Gillespie
> <abe.gillespie at GMAIL.COM>  on Sun, 4 Sep 2005 16:31:59 -0400.
> 
> > Is there a way to do this?  queryByPoint has the ability to supply a
> > radius but queryByShape does.  I thought that setting the layer's
> > TOLERANCE and TOLERANCEUNITS would help, but it doesn't seem to.  If
> > this isn't built in functionality, could anyone point me to an
> > algorithm that I can use to manually buffer a polygon before I supply
> > it to queryByShape?
> 
> Abe,
> 
> You will need to compile mapserver with GEOS support and use the
> '$shape->buffer()' on the existing shape to buffer it and then use the
> new shape ($bshape) to do the query.
> One thing I noticed in using it - turn on the error reporting before
> using shapeObj->buffer as there are a slew of things that can cause it
> not to work:
> 
> my $geoserr = new mapscript::errorObj();
> my $bshape = $shape->buffer($bdistance);
> print "ERROR: $geoserr->{message}\n";
> $bshape->setBounds();
> 
> HTH
> 
> Lowell
>