Mateusz Loskot wrote: > Kralidis,Tom [Burlington] wrote: >>> Tom, >>> >>> I'm also interested in some info about internals of DWithin >>> and Beyond operations. >>> These both operations are supported by FDO >>> (http://fdo.osgeo.org) but unfortunately I've not found much >>> information about their specification. >> True. The only info I found was from FES 1.0.0, section 8.2: >> >> "The spatial operators DWithin and Beyond test whether the value of a >> geometric property is within or beyond a specified distance of the >> specified literal geometric value." >> >> So both DWithin and Beyond take as inputs a geometry and distance value. > > Right. > > But I'd like to get more details, some math declarations or geometries > examples. > I asked on the FDO list about them: > > http://lists.osgeo.org/pipermail/fdo-internals/2007-May/001072.html
Tom, It seems these new spatial operators are based on Oracle features. Here is longer explanation posted as a reply to my question, on the FDO list: http://lists.osgeo.org/pipermail/fdo-internals/2007-May/001074.html Hope that helps. Cheers -- Mateusz Loskot http://mateusz.loskot.net _______________________________________________ geos-devel mailing list geos-devel@geos.refractions.net http://geos.refractions.net/mailman/listinfo/geos-devel
