Robin-- As a brainstorming idea, you could perhaps try something using grids.
Rasterize each layer of polygons (with same size, location, etc of grid cells), layer them, and run some sort of grid analysis counting how many layers of grid are at each cell location, thematically color by count. I have never done this in MapInfo, but it seems like something like this would work. Good luck. Nif Jennifer Minnick Senior Manager, National GIS Services STUDLEY From: Burchfield, Robin 10088 [mailto:[EMAIL PROTECTED] Sent: Wednesday, July 14, 2004 10:45 AM To: [EMAIL PROTECTED] Subject: MI-L Thematically mapping ovelapping polygons Hello Lisiters I need to complete a series of maps for different areas and have hit a problem. For each area I have a number of polygons (ranges from 10-35) that partially overlap one another. I wish to show these polygons all on one map but with some kind of indication as to the weight of separate polygons under each overlapping section e.g. if I have an area where 5 polygons overlap I would like this to be shown darker than an area where only two polygons overlap. I hope this makes sense and if so does anyone have any ideas on doing this. TIA Robin Burchfield Mapping & Data Officer Surrey Police Mount Browne Sandy Lane Guildford GU3 1HG Tel: 01483 482357 E-mail: [EMAIL PROTECTED] Internet communications are not secure and therefore Surrey Police does not accept legal responsibility for the contents of this message. This email and any attachments may be confidential. They may contain privileged information and are intended for the named addressee (s) only. They must not be distributed without our consent. If you are not the intended recipient, please notify us immediately and delete the message and any attachments from your computer, do not disclose, distribute, or retain this email or any part of it. Unless expressly stated, opinions in this email are those of the individual sender, and not of Surrey Police. We believe but do not warrant that this e-mail and any attachments are virus free. You must therefore take full responsibility for virus checking. Surrey Police reserves the right to monitor all email communications through their networks. --------------------------------------------------------------------- List hosting provided by Directions Magazine | www.directionsmag.com | To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Message number: 12615
