The Development of Location Based Services in MalaysiaThe RAD methodology used in this project can be broken down into four lifecycle processes, that is Requirements Planning, User Design, Construction and System Implementation. All these processes is repeated until all functionality is completed. This cycle really shows the importance of prototyping, as the development starts from the basic prototype until it can be considered as a final product. It also shows the need of user involvements, throughout the phases of the methodology. The transformation from basic requirement into a detail specification can be seen, as user tends to see their needs in detail description. After looking at the prototype. Here are some activities done during the RAD processes. 3.1 Requirements Planning Location Based Services are subjected to a set of specific requirement. Although LBS requirements are bind together with other disciplines such as mobile commerce requirements, there are a few issues that need to be address to cover the basic LBS requirement needs. We focuses on gathering the functionality and non-functionality requirements, until we then realize that there is no clear cut between this two categories. Some requirements tend to fit both categories, as requrement can be chained or made into more complex needs in the future. So , we chose to use a different category to categorize the LBS requirement. They are:-
The development of an LBS involves component based environment as the core technology relies on web services. A comprehensive and crucial modeling is the first crucial step towards building a successful application. To manage large application, model based design and development is paramount. Incorporating RAD with the industry standards modeling techniques and notations used in Unified Modeling Language (UML) delivers several advantages [8] :-
4 DISCUSSION The Web Service technique provides the interoperable capability of cross platform and cross language in distributed net environment. GIS services will be implemented more extensively by using web service approach. NSDI lets users share data stores and applications in a distributed environment. The web services architecture establishes a standard interconnection rules between services and information clients that nicely support the dynamic integration of data, which is the key to creating a spatial data infrastructure [12]. On top of LBS is the presentation tier, which let users access the LBS through their mobile phones. LBS should provide multiple platform access such as WAP, SMS or J2ME software to reach as many users as it can. In a web service environment, the LBS will receives and sends response to the client in an XML formatted document through SOAP . The XML document will then be transformed into WMS or OpenLS presentation format, through Extensible Stylesheet Language Transformation (XSLT). On the LBS itself, OpenLS specifies five core services, as mention above. These services provide different functionality with the summarization done by the presentation to the client. The data from NSDI will be integrated with a loose web service component. The service called catalogue service will access all the data inside NSDI without having to modify or upgrade current NSDI implementation. Normally, Clearinghouse works with z39.50 protocol, a standard for Information Retrieval. With the advent of technology, binary data from z39.50 can be encoded into SOAP in a web service environment.  FIGURE 3 LBS WITH OLAP INTEGRATION CONCLUSION Implementing LBS platform may open a lot of opportunities and can be beneficial to the public. The openness of an LBS architecture through standard technologies have made it possible to provide user with a standard data under one system. Creating location awareness to the public may help them to increase their decision making capabilities, thus help them to face unexpected situations. By integrating LBS with NSDI, a lot of possible applications can be generated for the use of public and in the E-Government environment. ACKNOWLEDGEMENT I wish to thank god, my supervisors Sri Devi Ravana and Maizatul Akmar Ismail for their endless support an encouragement. I also would like to express my gratitude to ASIA GIS 2006 International Conference committee, for giving me this wonderful opportunity. REFERENCES
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