Alexander Kruman thinks this is interesting: Overlay From CHAPTER 1: Spatial Information Management from Pro Oracle Spatial for Oracle Database 11g by Ravi Kothuri, Euro Beinat, Albert Godfrind Publisher: Apress Released: October 2007 Note ? Share this highlight http://www.safaribooksonline.com/a/pro-oracle-spatial/7036185/ Twitter Facebook Google Plus Email Get Instant Access Now Start a Free Trial Have an account? Sign in. Minimise Unlock the rest of Pro Oracle Spatial for Oracle Database 11g and 30,000 other books and videos By clicking this box, you confirm that you have read and agree to the terms and conditions of our Membership Agreement, and you understand that when your trial period ends, you will be required to provide billing information if you wish to continue using the service. Unlock the rest of this book Start a Free 10-Day Trial loading Learn about Safari for Business Have an account? Sign in.