Abstract
Display of quantitative data characterizing geographic regions is often most graphically accomplished by the use of outline maps, with enclosed regions shaded or toned to represent data associated with them. Such maps are of considerable value to hospital or regional health planners in demonstrating geographic and demographic characteristics of their service area, as well as health needs and patterns of use of health services. A method is described for the rapid automatic generation of finished flat-tone maps for such purposes by computer techniques, which by virtue of their economy, make such displays available for investigative use as well as for display of final results. Application of the method to study of utilization patterns for inpatient services at the Massachusetts General Hospital is described.
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