Hello all, I use this method to calculate centroid: For each region: 1. Calculate MBR (Xmin, Xmax, Ymin, Ymax) 2. Set an horizontal (or vertical) line in (Ymax - Ymin)/2 3. Calculate intersection between the previous line and all the segments of the region (at least there are two intersection: X1, X2) 4. Xcentroid = (X2 - X1)/2 and Ycentroid = (Ymax - Ymin)/2 This is only one method. CIAO Ing. Massimo Corinaldesi Regione Marche Ufficio Cartografia e Informazioni Territoriali tel. 071-8063529 [EMAIL PROTECTED] ---------------------------------------------------------------------- To unsubscribe from this list, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MAPINFO-L" in the message body, or contact [EMAIL PROTECTED]
