[gdal-dev] S-57 Polygon Warning...

[Eric J. Peters]

Thanks, that was it. I had the 1.1.1.1 revision of ograssemblepolygon. :)



On another note, the viewer fails to build due to an unsupported function call:
GDALCreateProjDef. I found this:

void *GDALCreateProjDef( const char * pszDef )
{
CPLDebug( "GDAL", "GDALCreateProjDef no longer supported." );
return NULL;
}

and assume there is replacement code somewhere and a viewer rewrite is in the
works. Is this a correct assumption? Is there anything I can do to assist in
getting the viewer to build?

Thanks,
-Eric.


On Sun, 10 Mar 2002, Frank Warmerdam wrote:

> Eric J. Peters wrote:
> > Hi-
> > 
> > I'm just starting to poke around with the GDAL toolkit, and I am
> > getting a warning on every OGRFeature(Area) when running s57dump on some ENC
> > data from NOAA. The message is:
> > 
> > Warning 1: Polygon assembly has failed for feature FIDN=136123493,FIDS=1224.
> > Geometry may be missing or incomplete.
> > 
> > I looked at one of the polygons, and it, although large and convoluted,
> > was a complete, enclosed polygon. I'm a real newbie to ENC, GIS, and this
> > toolkit - is there something fundamental I'm missing here? 
> 
> Eric,
> 
> First please verify that you have Revision 1.4 of
> gdal/ogr/ograssemblepolygon.cpp if you have been working from CVS. There was
> a problem in CVS briefly due to quirks in my new "tolerance" support in the
> polygon assembly code.
> 
> If that is OK, then perhaps you could forward me a dataset so I could check
> out why assembly is failing.
> 
> Note that my code for assembling S-57 polygons ignores the built-in information
> about arc direction and connectivity, and just tries to assemble the arcs
> by connecting end points. While I haven't noticed any problems with well
> behaved geometry before, it is possible this fails in some sort of weird
> case of self intersecting rings.
> 
> Best regards,
> 
> 
> -- 
> ---------------------------------------+--------------------------------------
> I set the clouds in motion - turn up | Frank Warmerdam, warmerdam at p...
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush | Geospatial Programmer for Rent
> 
> 
> 
> 
> 
> 
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> 


--
Eric J. Peters
eric at i...

==