Architecture Design and Imple mentation of Service Interfaces in LBS Platform

Through the LBS (location based service) platform, spatial information data can be conformed and shared in LBS fields and the platform can provide integrated applications and services. The architecture of the LBS platform based on the SIG (spatial information grid) distributed model is discussed in detail in order to store map data and query location information. The interfaces of the LBS platform accord with the criterion of OpenLS and can be transported in HTTP communication protocol by XML code. The interfaces are discussed using many examples. Compared with the traditional pull mode, a new location notification method based on push is researched in this paper. The push mechanism can fit the need for high capability of data transformation and management, and transporting information between the LBS platform and applications. An example system based on MAPGIS and CDMA location technology has been designed and developed, validating the platform model and interface usability.