1. Department of Computer and Information Science, The University of Mississippi, 201 Weir Hall, University, Oxford, MS 38677, USA
2. Department of Geological and Geological Engineering, The University of Mississippi, 120 A Carrier Hall, University, Oxford, MS 38677, USA
3. Civil, Environmental and Geospatial Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931, USA