Data is one of the most important components for GIS. It is accepted as a principle element of GIS by specialists. Both data collecting and updating are highly significant and difficult for GIS. Global Positioning System (GPS) is one of the mos efficient data collection methods for GIS. Data is one of the most important components for GIS. It is accepted as a principle element of GIS by specialists. Both data collecting and updating are highly significant and difficult for GIS. Global Positioning System (GPS) is one of the most efficient data collection methods for GIS. It is possible to obtain high-accuracy location data through GPS. As a result of development in location determination areas and wireless communication systems,GIS users can access the map or information via internet and also simultaneously share the collected data in the field. Mobile GIS is a mobile system which is integrated GIS and GPS on a portable computer. Trimble GeoXT was used as a mobile GIS device for this study. It contains mobile sub-meter GPS receiver and a handheld computer