I am a faculty member of the Department of Geography at National University of Singapore and is part of the Tropical Environmental Change research group. My research interests fall under the general theme of geographic information science with focus on formal spatial ontology, qualitative description of spatial features, semantic similarity within and across languages, volunteer geographic information, and cyber-infrastructure for spatiotemporal applications. I believe all these themes are important to improve current geospatial information technologies, both in terms of the quality of spatial data and the efficiency of geocomputation.

I am also interested in applications of geographic information systems, global positioning systems, and remote sensing as spatial decision support systems. Specific topic of interest include the modeling land use/land cover changes, identifying correlations between environmental determinants and public health issues in Asia, and the investigating accessibility and travel behaviors of people in built environment.