James.Sewell at lisasoft.com
Tue Feb 28 15:57:15 PST 2012
I have some questions on ST_Snap on linestrings:
The other day Martin Davis commented on the GEOS list:
The ultimate solution is perform snap-rounding over the entire input set. I don't think ST_Snap is doing this - AFAIK it's doing some heuristic-based snapping only.
I was under the impression that ST_Snap(a, b, x) snapped geom a to geom b within precision x. My understanding was that in practice this means that all lines in geom a are snapped to geom b if they are within x.
Am I misunderstanding how this works, or am I misunderstanding snap-rounding? Comments?
Ph: +61 3 8680 3250 Fax: +61 3 8680 3299
Level 9, 601 Bourke St, Melbourne Vic 3000
The contents of this email are confidential and may be subject to legal or professional privilege and copyright. No representation is made that this email is free of viruses or other defects. If you have received this communication in error, you may not copy or distribute any part of it or otherwise disclose its contents to anyone. Please advise the sender of your incorrect receipt of this correspondence.
-------------- next part --------------
An HTML attachment was scrubbed...
More information about the postgis-devel