Hi Hugh, I can't think of any obvious method - but I asked our development team and will file an enhancement request for a "Candidates First" option - in the same way as the Clipper has Bases First. That could help speed things up and reduce memory usage I'd think.
Besides that - the manual states... "After all features have been received, the factory then looks at each BASE feature and finds the closest CANDIDATE feature within <maxDistance> distance of the BASE feature." ...so there are (candidate * base) comparisons going on and there isn't really anything you can do except cut down on the number of candidates by preprocessing the data. For example, if your max distance is 100m then create a 100m buffer around the bases, overlay the candidates to find which are within this buffer and use them as the neighborFinder candidates. Of course, the buffer/overlay would take some time - perhaps more than you would gain in the neighborfinder - and there's plenty of proof that our developers aren't dumb and would've thought to add that in automatically, but it's the only thing I can think of at this point. Besides that - if it's a complex workspace with other transformers - be really sure that it is the NeighborFinder which is slow and not another part. There's a whole fmepedia category of performance related tips at... http://www.fmepedia.com/index.php/FME_Performance_Tuning Hope this helps Mark Mark Ireland, Senior Product Specialist Safe Software Inc. Surrey, BC, CANADA [EMAIL PROTECTED] http://www.safe.com Solutions for Spatial Data Translation, Distribution and Access --- In [email protected], "hughblackstock" <[EMAIL PROTECTED]> wrote: > > Hi There, > > Do you have any advice on how to increase the speed that a > neighborfinder transformer works? > > I'd like to find the closest polygon (suburb) to a line segment (road) > but this seemingly simple task seems to take a long time to process > even when I have a very small number of records. > > Thanks, > > Hugh. > For insights into what's up at Safe Software and what's on the development horizon, visit Safe's blog at spatial-etl.blogspot.com. Safe Software has also made slides available that outline enhancements planned for FME 2007. The slides are from the "Road Ahead" presentation given on Day 2 of the FME Worldwide Users Conference. To view these slides, visit www.safe.com/2006uc. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/fme/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/fme/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
