Collaborative Spatial Decision-Making Scientific Report for the Initiative 17 Specialist Meeting 16th-19th September, 1995 Santa Barbara, California Paul J. Densham, Initiative Leader Centre for Advanced Spatial Analysis Department of Geography University College London London WC1H OAP Marc P. Armstrong, Initiative Leader Departments of Geography and Computer Science The University of Iowa Iowa City, IA 52442 Karen K. Kemp, Initiative Leader NCGIA, Department of Geography University of California at Santa Barbara Santa Barbara, CA 93106-4060 National Center for Geographic Information and Analysis Report 95-14