Rahim, A. and Naqvi , N. A. . (2021) “GNSS-and-GIS based android integration of mobile based virtual guide application ExpLahore for walled city Lahore, Pakistan”, Natural and Applied Sciences International Journal (NASIJ). Peshawar, Pakistan, 2(1), pp. 12–25. doi: 10.47264/idea.nasij/2.1.2.