Bob, That sounds kind of strange. The voronoi for each store should represent the area closer to each store than to any other store - just as you expect. And therefore each customer should be within that voronoi that also contains the store they are closest to.
Have you tried using the DistanceCalculator, that came with MapInfo 7.8 - or even the improved one for MapInfo 8.0 ? This tool will give you the nearest x stores for each customer. x can be 1, 2 or as many as like. So this would be another way of getting the result, you are looking for. The tool from MapInfo 8.0 the result will be represented as a line between the customer and the store. I'm not sure if this also is the case with the 7.8 tool Peter Horsbøll Møller GIS Developer, MTM Geographical Information & IT COWI A/S Odensevej 95 DK-5260 Odense S. Denmark Tel +45 6311 4900 Direct +45 6311 4908 Mob +45 5156 1045 Fax +45 6311 4949 E-mail [EMAIL PROTECTED] http://www.cowi.dk/gis -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Robert DeRubeis Sent: Wednesday, January 11, 2006 5:58 PM To: mapinfo-l@lists.directionsmag.com Subject: [MI-L] voronoi polgon List, I have 2 point tables, stores and customers. I would like to find all the customers that are the closest distance to a particular store so I can assign information from the store to those customers. I created a voronoi polygon from the store points, then did a select statement where customer points are within store voronoi polygon. My problem is that I noticed in certain cases that some customer points fell into a store voronoi polygon, but was actually closer to another store. I measured the distance in MI Pro Ver 7.8 and it was not a big difference (8.19 instead of 7.78 miles), but wondered why the inaccuracy? Thanks, Bob _______________________________________________ MapInfo-L mailing list MapInfo-L@lists.directionsmag.com http://www.directionsmag.com/mailman/listinfo/mapinfo-l _______________________________________________ MapInfo-L mailing list MapInfo-L@lists.directionsmag.com http://www.directionsmag.com/mailman/listinfo/mapinfo-l
