Developing a geographic information system (GIS) : based expert system for mass appraisal model / by Ibrahim @ Atan Sipan, 1963-, Mohd. Ghazali Hashim, Azhari Husin, Hakim @ Miswan Mohammad, Dzulkarnain @ Zulkarnain Daud, Buang Alias, Abdul Hamid Mar Iman, 1960-, Suriati Ismail, Soeb Pawi