SVG Map Delivery Scheme for Resources Constrained Mobile Phones

Currently, most city maps browsing or displaying applications only support high-end mobile devices such as PDAs or smartphones. With GSM or GPRS network widely deployed around the world, there is a continuous demand for map applications to support resources constrained mobile phones. The study presents a map-on-demand delivery scheme which utilizes the SVG and J2ME technologies to dynamically deliver maps to users´ mobile phones according to their locations and devices´ capability. By taking advantages of spatial locality and temporal locality, pre-fetching and buffering schemes are also developed to enhance system performance. A prototyping system has been built and demonstrated to evaluate the proposed system´s feasibility. The results showed that depending on devices´ memory and network bandwidth, the simplest pre-fetching and buffering algorithms might in fact outperform the more complicated ones.