I.INTRODUCTION
There has been a considerable in crease in systems that offer mobile interfaces. A mobile user can easily use their mobile phone to learn their present location as well as to search for and inquire in to a variety of places located nearby. Currently,almost all social networking platforms, such as Twitter,Google and MySpace, provide such basic location service functions,like location sharing,location sign and location identification and soon. However,in traditional mobile location service systems (for example,the GPS based location service systems), the information is provided through an abstract metaphor that the user has to interpret and then project to the real world. Mean while,most commercially available GPS systems are too inaccurate to provide practical meaningful location based information.