Introducing Model-Building Into A G.I.S. Curriculum

Douglas J. Wheeler
U.S. Geological Survey and George Mason University

Scientists often develop models in an attempt to emulate nature by manipulating a specific set of variables. Geographic information systems (GIS) provide the means to integrate and analyze spatially-referenced variables in models. Modeling techniques do not have to be complex to be useful. The basic components of models (i.e., elements, function, explanation, prediction) may be applied to building and testing hypotheses in any type of scientific inquiry model. Theoretical and methodological models do not require the assigning of numerical values to elements nor extensive formulae to obtain results, although these conceptual models can not be evaluated statistically. Types of mathematical models used with GIS include binary, weighting, and quantitative models, using nominal, ordinal, and interval/ratio forms of data, respectively. Each type of model has its benefits and drawbacks. GIS provides the ideal tool for learning and applying modeling techniques.

Paper presentation -- need OH projector

Douglas J. Wheeler
U.S. Geological Survey and George Mason University
521 National Center, Reston, VA 22092
phone: 703-648-4703, fax: 703-648-4165
email: dwheeler@resdgw7.er.usgs.gov