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PORTAIL D'INFORMATION GÉOGRAPHIQUE

A dot matrix method of portraying continuous statistical surfaces

Auteurs :
GROOP, R. E.
SMITH, P.

Description :
Smooth statitical surfaces are conventionally represented by isoline maps or block diagrams. Perceptual studies have suggested that these illustrations are difficult for map readers to interpret and that overall surface configuration is particularly elusive on isoline maps. This paper presents an alternative method of illustrating continuous surface. It employs a digital plotter to create finely-spaced point symbols that vary in size according to interpolated z-values. After photographic reduction, the maps has the appearance of a continuous change in gray tone corresponding to the surface it represents.


Type de document :
Article de périodique

Source :
American cartographer Washington, 1982, vol. 9, n°. 2, p. 123-130, Références bibliographiques : 18 réf.

Date :
1982

Langue :
Anglais
Droits :
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