[gdal-dev] Reading CurveString and CurvePolygon Geometries from FGF Data
rush at winkey.org
Tue Jan 21 10:47:17 PST 2014
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
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
> View this message in context: http://osgeo-org.1560.x6.nabble.com/Reading-CurveString-and-CurvePolygon-Geometries-from-FGF-Data-tp5098667p5099296.html
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