Zarine Kemp Lei Tan Jacqueline L. Whalley Interoperability for Geospatial Analysis: a Semantics and Ontology-based Approach. 83-92 2007 ADC http://crpit.com/abstracts/CRPITV63Kemp.html conf/adc/2007 db/conf/adc/adc2007.html#KempTW07