Hi, I had the same problem while using ChangeDetector on shapefile comparisons. I think that¡¦s because ChangeDetector will detect even the slightest changes. I.e. both new and old files have to match exactly. You could try the CoordinateRounder to round off the coordinates or use an unique field to do the comparison. In my case, rounding off didn't work too well so I created an unique attribute and use that to detect changes. Hope this will give you some ideas on what to do in your case.
Carol --- In [email protected], "adelcrowsrb" <[EMAIL PROTECTED]> wrote: > Hi, > > I have been tring to use the change detector to identify any updates > that have been made on new vector files that I have received when > compared with older versions I have - (MapInfo tab format). > > The "unchanged" output file created contains no data, while > the "added" output file and "deleted" output file contains all the > data. It is obvious from viewing the old and revised files that > little has changed. > > Would anyone know what is happening here or how exactly the change > detector works? Any help would be appreciated! > > Thanks. Get the maximum benefit from your FME, FME Objects, or SpatialDirect via our Professional Services team. Visit www.safe.com/services for details. Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/fme/ <*> 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/
