1. School of Civil Engineering; College of Engineering; University of Tehran; 11155-4563 Tehran Iran
2. Faculty of Surveying and Geomatics Engineering; Department of Geodesy; K. N. Toosi University of Technology Iran
3. Department of Civil, Environmental and Architectural Engineering; University of Colorado; Boulder CO 80309-0428 USA
4. Dept. of Surveying and Geomatics Engineering; Center of Excellence in Geomatics, Engineering and Disaster Prevention; College of Engineering; University of Tehran; 11155-4563 Tehran Iran