| With the rapid development of mobile corresponding technology,more mobile value-added service was push out.In the mean time, the Wap Mobile Location Service is constantly improved.Positioning technology and the spatial database management are the important components of Mobile Location Service ,which decides the service level. How to improve the qulity of positioning and the storage of spatial database is need to be considered.Wireless nerwork Auxiliary positioning and triangle operation location are embedded into terminal and chipsets of CDMA. It use the time difference of the signal which the CDMA terminals can received to calculate the latitude and longitude by built-in software, and it is the only synchronization network of Entire Network. So Gpsone is the most accurate positioning technology.Spatial database has a huge number of data , include of not only the geogrohpical attributes data ,but also a lot of the spatial data , and they are indivisible. So the management of spatial database is complex and important. Oracle spatial is the special components of Oracle 10.0, which integrats the correlation function and procedure. In order to storage,access and analysis efficiently , it uses the object-relational data model as the base of spatial object's storage and management, and it correlated the various information element to do spatial analysis and other operations.This paper has introduced the theory and technology related with the development of Mobile Location Service, and has researched the management of spatial dadabase. In the process of practice , with the technology of Gpsone,J2EE,XML,WML and Oracle 10.0,we designed this WAP Moblie positioning system.Using the mixed positioning technology and spatial database technology we achieved these function , such as mobile positioning , side positioning, the map generation, data access and transmission ,and geographic information inquiring .Being test by the simulator and mobile ,the practical value of this system was proved. |
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