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@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/gdal-dev _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
