Good afternoon,
To test the results of the LineGeneralizer (using the Douglas
algorithm with a zero tolerance), I used the Densify transformer to
add vertices to my lines prior to generalization. I figured that
generalization should remove all the vertices added by Densify.
LineGeneralizer did remove some of these unnecessary vertices, but not
all of them. I haven't yet determined why this is.
Regards,
JD
--- In [email protected], "mark2atsafe" <[EMAIL PROTECTED]> wrote:
>
> I think the LineGeneralizer will do what you need if you use the
> Douglas(-Poiker) algorithm and set the tolerance to zero. When the
> tolerance is zero it should just remove intermediate points on a
> straight line, without changing the shape of the feature.
>
> Regards,
>
> Mark
>
>
> --- In [email protected], "jamison_leach" <hemsidan@> wrote:
> >
> > Good afternoon,
> >
> > Does anyone know if there is there a way to remove unnecessary
> > vertices from lines? By unnecessary, I mean vertices that contribute
> > nothing to the shape of the line. If we were to compute an angle at
> > such vertices, it would be 180 degrees. Using the Generalizer
> > transformer would eliminate non-redundant vertices and change the
> > shape of my lines, which is undesirable, even if the shape would
> > change only slightly.
> >
> > Many thanks,
> > J.D. Leach
> > U.S. Census Bureau
> >
>
For insights into what's up at Safe Software and what's on the development
horizon, visit Safe's blog at spatial-etl.blogspot.com.
Safe Software has also made slides available that outline enhancements planned
for FME 2007. The slides are from the "Road Ahead" presentation given on Day 2
of the FME Worldwide Users Conference. To view these slides, visit
www.safe.com/2006uc.
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