CoordinateSequence::removeRepeatedPoints does NOT do what you want - it only removes consecutive points which have *identical* values.
You can probably use the DP Simplifier to remove redundant point along straight lines by calling it with a very small distance tolerance. This will be a bit brittle however - if there happen to be points along the square edges which are within that tolerance of a corner then the corner point might get removed instead. (For non-rectilinear geometry this doesn't really matter, but of course for a rectangle it will make it slightly non-rectilinear) On Thu, Mar 28, 2019 at 3:51 AM Paul Meems <bontepaar...@gmail.com> wrote: > I'm looking at geos::simplify::DouglasPeuckerLineSimplifier ( > http://geos.refractions.net/ro/doxygen_docs/html/classgeos_1_1simplify_1_1DouglasPeuckerLineSimplifier.html#_details) > and geos::geom::CoordinateSequence::removeRepeatedPoints ( > http://geos.refractions.net/ro/doxygen_docs/html/classgeos_1_1geom_1_1CoordinateSequence.html#a22 > ) > > Looking at the explanation of the Ramer–Douglas–Peucker algorithm ( > https://en.wikipedia.org/wiki/Ramer%E2%80%93Douglas%E2%80%93Peucker_algorithm) > I understand that the resulting geometry might be slightly different, > that's why a tolerance needs to be added. > > But I don't want my geometry to be altered I just want to remove vertices > that don't contribute to the shape of the geometry. > Consider a square with not only 4 corner points but also points between > the corner points. > Those points I want to remove because they are redundant and without them, > I still have the 'same' square. > > Should/can I use removeRepeatedPoints() or should I use another method? > > Thanks, > > Paul > > _______________________________________________ > geos-devel mailing list > geos-devel@lists.osgeo.org > https://lists.osgeo.org/mailman/listinfo/geos-devel
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