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ERIC Number: ED180923
Record Type: Non-Journal
Publication Date: 1979-Oct
Pages: 35
Abstractor: N/A
Reference Count: N/A
Statistical Mapping by Computer.
Utano, Jack J.
The function of a statistical map is to provide readers with a visual impression of the data so that they may be able to identify any geographic characteristics of the displayed phenomena. The increasingly important role played by the computer in the production of statistical maps is manifested by the varied examples of computer maps in recent publications. The speed and versatility with which the computer is able to process locational information and generate corresponding graphic representations make it an invaluable mechanism for such wide ranging applications as experimenting with different ways of representing a geographic distribution, producing a map series for a regional atlas, or supplementing statistical analysis of spatial data. This paper discusses one such computer program named STATMAP (Statistical Mapping) which is able to generate the following statistical map representations on the CalComp vector plotter: 1) a continuous-tone choropleth map; 2) a graduated-circle map; 3) a graduated-bar map; and 4) a graduated-polygon map, where the latter three reflect special cases of the general graduated-symbol statistical map. There are three major sections to the report. In the first, the theoretical aspects concerning each of the four statistical maps are addressed. The second section presents a method for producing a "viewable" statistical map when skewed spatial distributions are involved. An overview of the structural components of the computer program is provided in the last section. (Author/RM)
Publication Type: Speeches/Meeting Papers; Opinion Papers
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A