Abstract
Computer mapping systems using simple control languages and using plotters as output devices have not only made it easier to produce computer maps but have greatly enhanced the visual quality of computer maps. This paper outlines the use of a choropleth mapping program which is one component of a thematic mapping package being developed at Waterloo University. The program is easy to use, provides a wide range of shadings, and allows the user to exercise a degree of control ranging from producing a "default" map in a standard format to complete specification of map layout and design. An example application is presented in which maps generated by the program are used to aid in the analysis of socio-economic patterns in Metro Toronto. The maps clarify inter-relationships between the distributions examined, thus providing a useful and inexpensive supplement to statistical analysis of socio-economic characteristics.
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