THE REAL TIME GPS TRACKING ON THE IMAGE SATELLITE BY USING GEOGRAPHICAL INFORMATION SYSTEM PROGRAM

المسار الآني لمنظومة تحديد الموقع العالمي على البيانات الفضائية باستخدام برامجيات نظم المعلومات الجغرافية

Spatial data is the crucial component of a GIS. The important sources of spatial data are the already existing digital files, maps, which can be digitized, image satellite, aerial photography and more recently GPS. GPS (mapping type receivers) can be used to map an area and the data can be converted into GIS compatible forms. The principle objective of the present study, is to combine a portable (GPS, type: GPSMAP76SCx) device with the GIS software (Global Mapper 10.0) a laptop computer as a one tracking system, to monitor the real time tracking path of the moving vehicle on the image satellite of the Mosul University Campus (i.e.; integrate imagebased road tracking (local) and GPS (global) data) and to study the effect of the spatial resolution and the georeferncing coordinate system of the image satellite on the positional accuracy of the GPS tracking path. In order to present consistent representation of reality, several layers of GIS datasets with different resolution have been used to view the GPS tracking path. The results show that the level of the positional accuracy of the GPS tracking path depend on the type and accuracy of the used GPS, the accuracy of georeferncing coordinate system and spatial resolution of the adopted image satellites (GIS layers). It s also show that the applying of satellite images in consecutive time can be give an illustration for the updating the maps in the GIS database for the purpose of planning, mapping, and surveying applications.