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Multi-Touch is a technique that provides user the parallel interaction with the Graphical User Interface. This paper presents innovative ideas on the development of hardware and software applications of a multi-touch system. Besides that, Frustrated Total Internal Reflection (FTIR) method and Rear Diffused Illumination Reflection (RDIR) method have been integrated to improve the performance and accuracy of the blobs detection for the tracking system. A new web-based Geographical Information System (GIS) application has been developed to demonstrate the effect of the multi-touch sensing technology.