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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B2. Istanbul 2004 
  
Figure 2: A prototype system of WAP-based Mobile GIS 
6. CONCLUSION AND PROSPECT 
WAP-based Mobile GIS is a very new study field of 
Geoinformatics. Above all, the architecture is solved, because it 
is the key and core of the distributed system. In this paper, 
based on J2EE, an open distributed architecture is proposed for 
WAP-based Mobile GIS. And a prototype system is designed 
and developed based on the architecture which is composed of 
four logic tiers. The prototype system can successfully work on 
WAP phones, which proves that the architecture is feasible. 
At present, low bandwidths are still the main bottleneck of all 
mobile applications (Wei Zhongya, Xu Sunxin and Wu Lun, 
2003). So researches on the organization of geospatial data at 
the fat server side and on the presentation of geospatial 
information at the thin client side should be done farther. 
Fortunately, the mobile network is towards the development of 
3G. In 3G age, when the mobile terminal moves at the same 
speed as vehicle, the transmission speed is 144kbps, when the 
mobile terminal moves at the walking speed or un-moves in 
outdoor, the transmission speed is 384kbps, when the mobile 
terminal is in the room, the transmission speed is up to 2 Mbps. 
The 3G bandwidths will satisfy with the requirements of 
geospatial information wireless transmission. Therefore, it is 
not hard to understand that WAP-based Mobile GIS will have 
better development and application perspectives and 
considerable business value. 
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