Land administration, spatial data infrastructures (cadastre)
Professor Williamson's teaching and research is concerned with cadastral, land and geographic information systems, land administration and spatial data infrastructures, in both developed and developing countries. He has published extensively on these topics. He has undertaken research or consultancies world-wide including for AusAID, the United Nations and the World Bank. He is a Member of the Order of Australia (AM), a Fellow of the Academy of Technological Sciences and Engineering Australia (FTSE), a Fellow of the Institution of Surveyors Australia Inc., a Fellow of the Institution of Engineers Australia, a Fellow of the Royal Institution of Chartered Surveyors, an Honorary Fellow of the Mapping Sciences Institute, Australia and an Honorary Member of the International Federation of Surveyors (FIG). He was Chairperson of FIG Commission 7 (Cadastre and Land Management) 1994-98 and Director United Nations Liaison for the FIG from 1998 - 2002.
He is currently a member of the Executive and Chair, Working Group 3 (Cadastre), UN sponsored Permanent Committee on GIS Infrastructures for Asia and the Pacific. At Melbourne he has been President of the Academic Board and Pro-Vice-Chancellor, and is currently Head of the Department of Geomatics and works closely with the Centre for Spatial Data Infrastructure and Land Administration. Awarded the Centenary Medal by the Prime Minister for service to Australian society in research and geomatics engineering and surveying 2003.