Hello Keith I've had such a problem. There's no standart way for this functionality. But I've made this so : 1. extract all object polygons into different objects (using function extractnodes) 2. check whether at least one of these objects lays "entire within" another one. The point is that when you extract polygons from the region with hole you then get overlapping objects, one of them lays entirely within the secoond one. Just try and you'll see it Good luck Sent: Thursday, 20 November 2003 12:36 AM To: [EMAIL PROTECTED] Subject: MI-L Identifying Regions with Holes
Hi all, Is there any way to identify, by a query or other straightforward process, all regions that have a hole or holes in them? The ObjectInfo function will enable multi-polygon regions to be identified, but I can't see that it will provide what I want. Any suggestions? TIA, Keith ---------------------------------------------- Keith Campbell GIS Consultant ATKINS ENVIRONMENT Cornerstone House Stafford Park 13, Telford Shropshire, TF3 3AZ England Tel: +44 (0)1952 21 3268 * Fax: +44 (0)1952 20 0981 * Email: [EMAIL PROTECTED] * Web: www.atkinsglobal.com * This email and any attached files are confidential and copyright protected. If you are not the addressee, any dissemination of this communication is strictly prohibited. Unless otherwise expressly agreed in writing, nothing stated in this communication shall be legally binding. --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 9222 --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 9232 Best Regards, Katerinka --------------------------------- Do you Yahoo!? Free Pop-Up Blocker - Get it now
