Thanks for the various and quick answers. They fall into 2 categories: Visualization of line direction. The simplest approach is to force a style on the border lines of the regions; pen 57 is the easiest to see; it is made of >>> from origin to end. Pretty good for isolated regions, or those sitting on the edges. It may become unreadable if both directions are overlaid, or completely misleading with donuts. Mathematical algorithm Both functions I received used essentially the same formula, a cumulative area computed on all pairs of successive nodes; it might be time consuming if the polygon is complex, but it seems reliable. I preferred Warren�s set up simply because it lets you query individual polygons of complex regions. I will put that function and a script that uses it to display a label on a queried region on our site as soon as I can. Thanks again. Jacques Paris _______________________________________________________________________ List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, send e-mail to [EMAIL PROTECTED] and put "unsubscribe MapInfo-L" in the message body.
