1. Faculty of Geodesy and Geomatics Engineering, K. N. Toosi University of Technology, Tehran 19967-15433, Iran
2. Division of Surveying-Geodesy, Land Law and Real Estate Planning, Royal Institute of Technology (KTH), SE-10044 Stockholm, Sweden
3. Department of Computer and Spatial Sciences, University of Gävle, SE-80176 Gävle, Sweden
4. Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong