well, i´ve read your last mail ( I need an RSS feed for you! ) and perhaps Postgis doesn´t find st_xmin function because the arg is a box2d... But if it casts the box3d to box3d... Yes, i´m a little confused :) Gus -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.refractions.net/pipermail/postgis-users/attachments/20071002/1cad4d48/attachment.html