books.google.com.pk - This text provides a background view of the object approach, related geometric aspects, the different level of data modelling and the role of geo-information theory. The rest of the book builds upon these concepts describing the applicability of broader aspects such as topology, thematic object classes...http://books.google.com.pk/books/about/An_Introduction_To_The_Theory_Of_Spatial.html?id=dk9Ebkf5x7UC&q=point+objects&utm_source=gb-gplus-shareAn Introduction To The Theory Of Spatial Object Modelling For GIS
