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Basing Non-Linear Displays on Vector Map Formats

Published online by Cambridge University Press:  01 January 2000

Daniel N. Mountjoy
Affiliation:
North Carolina A&T State University
Celestine A. Ntuen
Affiliation:
North Carolina A&T State University
Sharolyn A. Converse
Affiliation:
North Carolina A&T State University
William P. Marshak
Affiliation:
Sytronics Inc.

Abstract

One approach to increasing the area coverage of small-screen map displays is to exploit the ‘elasticity’ of the electronic display through use of non-linear scaling. Although resolution is necessarily lost in areas of smaller scale, bitmap images lose important information when re- scaled. This can render features unrecognisable and text unreadable. Vector maps are more tolerant to non-linear scaling because critical position information found in vertices of lines is distorted without being lost. Examples of non-linear scaling are presented to demonstrate the effect on bitmap and vector images. Ongoing research examining the user performance benefits of non-linear displays is also described.

Type
Research Article
Copyright
© 2000 The Royal Institute of Navigation

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