Estimates of trend direction/ vagueness and bias in map reading.

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

A test of map users' identifications of regional trend directions documents the imprecision and bias of directional estimates. Fewer than 40% of the azimuths marked on circular test maps by the subjects were accurate within 5o. No relationship was readily apparent between accuracy and the complexity of the test surfaces symbolized as continuous-tone choropleth maps. Estimates of trend direction were biased toward the closest of 8 prototype cardinal and diagonal directions when the difference between correct and rptotyped directions was 10o or less. Generalization to one of these 8 principal directions is an example in map reading of the vagueness common to numerous cognitive classifications. When long-term memory intervenes in map analysis and interpretation, this directional generalization might lead to further inaccuracy in the conceptualization of geographic relationships.-Author

Original languageEnglish (US)
Title of host publicationCanadian Cartography
Pages45-60
Number of pages16
Volume16
Edition1
StatePublished - 1979

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azimuth
trend
test
analysis
document

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Monmonier, M. S. (1979). Estimates of trend direction/ vagueness and bias in map reading. In Canadian Cartography (1 ed., Vol. 16, pp. 45-60)

Estimates of trend direction/ vagueness and bias in map reading. / Monmonier, M. S.

Canadian Cartography. Vol. 16 1. ed. 1979. p. 45-60.

Research output: Chapter in Book/Report/Conference proceedingChapter

Monmonier, MS 1979, Estimates of trend direction/ vagueness and bias in map reading. in Canadian Cartography. 1 edn, vol. 16, pp. 45-60.
Monmonier MS. Estimates of trend direction/ vagueness and bias in map reading. In Canadian Cartography. 1 ed. Vol. 16. 1979. p. 45-60
Monmonier, M. S. / Estimates of trend direction/ vagueness and bias in map reading. Canadian Cartography. Vol. 16 1. ed. 1979. pp. 45-60
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