1. Department of Geosciences, Texas Tech University, Lubbock, TX 79409, USA
2. Section of Geography, School of Humanities, Universiti Sains Malaysia, Gelugor 11800, Malaysia
3. Department of Urban and Regional Planning, University of Illinois, Urbana-Champaign, IL 61820, USA
4. Department of Urban Planning, Tarbiat Modares University, Tehran 1411713116, Iran
5. School of Architecture, Planning and Preservation, University of Maryland, College Park, MD 20740, USA