Location based services (LBSs) provide personalized services to the subscribers based on their current position using global navigation satellite system (GNSS), geographic information system (GIS) and wireless communication (WC) technologies. LBS offers modern world the tool for efficient management and continuous control. More and more people involve LBS in their industry and day to day life to better achieve their goals. The increasing demand for commercial LBS has driven scientists to focus on more accurate positioning solutions. It employs accurate, real-time positioning to connect users to points of interest and advises them of the current conditions such as traffic and weather conditions, or provides routing and tracking information using wireless devices. It is important to integrate the mobile computing technology and the GIS technology in order to meet the needs of LBS, which is considered one of the most promising applications of GIS. The location of the caller could be determined by other position determination techniques. these include cell-id, enhanced observed time difference (E-OTD), observed timed difference of arrival (OTDOA), wireless assisted GNSS (A-GNSS) and hybrid technologies (combining A- GNSS with other standard technologies). Cell-ID is used for positioning purposes, but it is not accurate. In the following we will present an introduction on the LBS, its combination with GIS and WC, and some of our recent related work.
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