[gdal-dev] OGR functionality to remove holes?

[Even Rouault]

Le lundi 20 janvier 2014 21:48:12, xavier lhomme a écrit :
> 3D engine doesn't like hole in a polygone.
>  A way to render such polygon is to link the outer ring and the inner ring.
> (But it's better to use tesselation.)

Ah right tesselation would do it.

> 
> for example if you have a rectangle ABCD and a triangle describing the hole
> ( EFG) , you can create a polygone ABCDAEFGA

Yes, but such description isn't compliant with OGC geometries.

> 
> It's how I understand the question. I don't think you will find such
> function in GEOS (or JTS)
> 
> 
> 2014/1/20 Even Rouault <even.rouault at mines-paris.org>
> 
> > Le lundi 20 janvier 2014 21:27:18, agerrius a écrit :
> > > Hi all,
> > > 
> > > Does OGR have any build in functionality to convert features with holes
> > > into features without holes? I don't mean delete the inner rings, but
> > > change the geometry so that it covers the same area with only the outer
> > > ring.
> > 
> > I'm afraid not to understand what you mean. What is the difference
> > between deleting inner rings and "changing the geometry so that it
> > covers the same area with only the outer ring" ?
> > 
> > There's no one-line invocation for such functionnality. But it can be
> > done with the OGR API and a few dozains lines of code.
> > 
> > > I know GlobalMapper has such a function, but it would be useful if I
> > 
> > could
> > 
> > > perform it in my code directly with the OGR library.
> > > 
> > > Thanks,
> > > 
> > > Arno
> > > 
> > > 
> > > 
> > > --
> > 
> > > View this message in context:
> > http://osgeo-org.1560.x6.nabble.com/OGR-functionality-to-remove-holes-tp5
> > 0
> > 
> > > 99099.html Sent from the GDAL - Dev mailing list archive at Nabble.com.
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