On Mon, Feb 03, 2014 at 11:29:13AM +0100, Rémi Cura wrote: > By the way Sandro, > > don't you think that Geos should automatically translate the whole input > using a pivot point ? > It would of course be difficult when getting data pieces by pieces (like in > aggregates), > but when the whole data is available, why not?
Isn't that what I just said in my previous mail ? :) If you meant "always" you must be aware that the translation is not always safe as when you translate back you can introduce collapses. This is a real case if you search the GEOS bug tracker. So BinaryOp does it only if direct computation fails with a TopologyException (if it still does it, as new versions directly switch to a FixedPrecisionModel, IIRC). Again: this is best discussed in a GEOS ticket. --strk; > It would considerably help toward reducing the precision issue, and would > not be so costly (a read of all coordinates to get min/max, then > subtraction/addition for every coordinate). > > > Maybe it could be add at the geos input/ouput level, thus not necessitating > to change all code? > > Cheers, > > Rémi-C > > > > > 2014-02-03 Sandro Santilli <[email protected]>: > > > On Mon, Feb 03, 2014 at 10:54:13AM +0100, Rémi Cura wrote: > > > Hey, > > > you use far too big coordinates. > > > Please consider using st translate on your data, then curve offset, then > > > inverse translate. > > > > Speaking of which, this treatment is one of those performed on catching > > an exception in binary operations, maybe the GEOSOffsetCurve method should > > be changed to _use_ the BinaryOp class (detail more useful in a GEOS > > ticket, > > btw). > > > > --strk; > > _______________________________________________ > > 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 -- () ASCII ribbon campaign -- Keep it simple ! /\ http://strk.keybit.net/rants/ascii_mails.txt _______________________________________________ postgis-users mailing list [email protected] http://lists.osgeo.org/cgi-bin/mailman/listinfo/postgis-users
