[gdal-dev] Reading CurveString and CurvePolygon Geometries from FGF Data

[Brian Case]

bob,

if you decide to go the mask band route you wont be able to use a vrt.
you will need to use gdalwarp or mapserver

Brian


On Tue, 2014-01-21 at 09:04 -0800, Bob Cave wrote:
> Even Rouault wrote
> > Le vendredi 17 janvier 2014 17:08:38, Bob Cave a écrit :
> >> Hello,
> >> 
> >> I am using the OGR Spatialite driver to read a database that has FGF
> >> geometries.  Some of the geometries are CurvePolygons, which are not
> >> currently supported in OGRGeometryFactory::createFromFgfInternal() as of
> >> GDAL 1.10.1.
> >> 
> >> Is support for FGF CurveString and CurvePolygon geometries currently in
> >> development?
> > 
> > Not that I'm aware of.
> > 
> > There's not yet support in OGR core for curve geometries, so that would be
> > a 
> > preliminary step to implement support for the FGF curve geometries. This
> > is 
> > something that could be part of the big changes for OGR 2.0 
> > (http://trac.osgeo.org/gdal/wiki/GDAL20Changes). A few years ago I had
> > started 
> > preliminary work in a sandbox but didn't pursue.
> > 
> > Another annoying thing for implementation is that the link in 
> > http://trac.osgeo.org/fdo/wiki/FDORfc16 to the FGF binary spec seems to
> > have 
> > disappeared.
> > 
> > Do people actually use FDO SQLite databases.... ?
> 
> Apparently, one of our customers uses an FDO SQLite database.  
> 
> I have seen that the OGR core does not currently support curve geometries,
> so these objects could not be handled that way.  I was thinking that perhaps
> someone might be working on producing a polyline or polygon representation
> of an FGF curve object.
> 
> I found the FGF Binary Specification  here
> <http://www.osgeo.org/files/fdo/docs/FDG_FDODevGuide/files/WSfacf1429558a55de8821c21057fbebc2b-789.htm> 
> .
> 
> Thanks,
> 
> Bob
> 
> 
> 
> --
> View this message in context: http://osgeo-org.1560.x6.nabble.com/Reading-CurveString-and-CurvePolygon-Geometries-from-FGF-Data-tp5098667p5099296.html
> Sent from the GDAL - Dev mailing list archive at Nabble.com.
> _______________________________________________
> gdal-dev mailing list
> gdal-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/gdal-dev