1. Department of Geography, The University of Utah, Salt Lake City, UT, USA
2. Department of Computer Science and Engineering, University of Alaska Anchorage, Anchorage, AK, USA
3. Institute of Behavioral Science and Department of Geography, University of Colorado Boulder, Boulder, CO, USA
4. Institute of Behavioral Science and Department of Anthropology, University of Colorado Boulder, Boulder, CO, USA
5. Institute of Behavioral Science and Department of Political Science, University of Colorado Boulder, Boulder, CO, USA