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Proceedings Paper

Wireless digital map coding and communication for PDA (personal digital assistant) applications
Author(s): Zhidong Yan; C.-C. Jay Kuo
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Paper Abstract

The transmission of multi-scale digital map information via a wireless link of the personal digital assistant (PDA) system is investigated in this work. We consider a digital map representation of the vector model consisting of 29 layers, in which the road layer plays the most important role. Based on the street segment length, the road layer is classified into different scales. A multi-scale map database can be constructed by adding the classification information without modifying the original database. Unlike the conventional digital map service, where the retrieved map data is first generated as a bitmap image, compressed at the server side and then transmitted to the remote client via wired link, we propose a new approach that can overcome the narrow bandwidth of the wireless channel. The basis idea is to transmit the map drawing commands rather than the rendered bitmap data by assuming that the PDA has the sufficient computational power to render the map at the client side. Preliminary experiments have been done to verify the effectiveness of the proposed scheme. It is demonstrated that the acceptable transmission through the wireless channel of 8 Kbps can be achieved.

Paper Details

Date Published: 1 October 1998
PDF: 11 pages
Proc. SPIE 3460, Applications of Digital Image Processing XXI, (1 October 1998);
Show Author Affiliations
Zhidong Yan, Univ. of Southern California (United States)
C.-C. Jay Kuo, Univ. of Southern California (United States)

Published in SPIE Proceedings Vol. 3460:
Applications of Digital Image Processing XXI
Andrew G. Tescher, Editor(s)

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