Computer Simulation in Population Geography

Two concepts of models in geography are distinguished: one is a model in the form of an equation or system of equations; the other is a computer program that uses a simulation algorithm. The paper deals with the computer simulation aspect, distinguishing four levels of machine modeling: (1) programs for the methods of analysis generally used in geography, particularly, correlation and regression analysis; (2) programs for the analysis of settlement maps; (3) computer simulation of complex processes, such as R. L. Morrill's model of town growth in southern Sweden, using Monte Carlo simulation; (4) the use of computers in the analysis of theoretical problems, illustrated by R. S. Yuill's study of diffusion waves, also using the Monte Carlo method.