INTRODUCTION With the spread of smartphones and the development of wireless technology, data communication is increasingly important than voice communication. Users of mobile devices want ubiquitous connectivity to the Internet and obtain query results in text, image, or video clips. Current implementation of data search on mobile devices exhibits many obstacles for conveniently displaying local data. For example, it is very hard to search information when the user does not provide a location-based keyword such as the name of the street or building. To address this issue, location-based services (LBS) have been developed, which search for information pertinent to user’s vicinity based on the user’s location. With LBS, location data is acquired by means of mobile relay station data or global positioning system (GPS) and used in applications such as automobile navigation, traffic monitoring, shopping, etc. [1]. Such applications showed data primarily in text or on maps in their early versions, however, an increasing number of applications have adopted augmented reality to display more intuitively by exploiting the many sensors attached on more recent devices