Ok if I understand right, implementing it at the sql level would be : - compute convex envelop - order edges by angle - round angle to a given precision, keep distinct values - for each angle, rotate and compute bbox and area
keep bbox and rotation giving the min area. Cheers, Rémi-C 2014-10-23 18:46 GMT+02:00 Stephen V. Mather <[email protected]>: > That would be really cool. Could be a set of functions. It would be > interesting to see if the triangulation optimizations listed at > http://cgm.cs.mcgill.ca/~orm/rotcal.html are faster than the JTS/GEOS > equivalents. > > Stephen V. Mather > GIS Manager > (216) 635-3243 (Work) > clevelandmetroparks.com > > > > > ________________________________________ > From: [email protected] < > [email protected]> on behalf of Sandro Santilli < > [email protected]> > Sent: Thursday, October 23, 2014 12:36 PM > To: PostGIS Users Discussion > Subject: Re: [postgis-users] Oriented BBox Efficient computing? > > On Thu, Oct 23, 2014 at 06:17:56PM +0200, Rémi Cura wrote: > > Wov thanks everybody : > > Seems it possible to do it fully geometrically : > > http://cgm.cs.mcgill.ca/~orm/rotcal.html > > Nice, would be a good candidate for a new PostGIS function > (possibly via JTS/GEOS) > > --strk; > > () Free GIS & Flash consultant/developer > /\ http://strk.keybit.net/services.html > _______________________________________________ > postgis-users mailing list > [email protected] > http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users > _______________________________________________ > postgis-users mailing list > [email protected] > http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users >
_______________________________________________ postgis-users mailing list [email protected] http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users
