Real-time generalization of point data in mobile and web mapping using quadtrees
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Authors
Weibel, Robert
Author (Corporation)
Publication date
29.04.2013
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Type
01A - Journal article
Editors
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Parent work
Cartography and Geographic Information Science
Special issue
DOI of the original publication
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Series
Series number
Volume
40
Issue / Number
4
Pages / Duration
271-281
Patent number
Publisher / Publishing institution
Taylor & Francis
Place of publication / Event location
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Abstract
With a focus on mobile and web mapping, we propose several algorithms for on-the-fly generalization of point data, such as points of interest (POIs) or large point collections. In order to achieve real-time performance, we use a quadtree data structure. With their hierarchical subdivision structure and progressive levels of detail, indices of the quadtree family lend themselves as auxiliary data structures to support algorithms for generalization operations, including selection, simplification, aggregation, and displacement of point data. The spatial index can further be used to generate several local and global measures that can then serve to make educated guesses on the density and proximity of points across map scales, and thus enable control of the operation of the generalization algorithms. An implementation of the proposed algorithms has shown that, and thanks to the quadtree index, real-time performance can be achieved even for large point sets. Furthermore, the quadtree data structure can be extended into a caching structure, which can be used to store pre-computed generalizations; thus, a desired level of detail (LOD) can simply be retrieved from cache.
Keywords
Mobile and web mapping, On-the-fly generalization, Real-time generalization, Point data generalization, Map generalization, Auxiliary data structure, Quadtree, Cartography
Subject (DDC)
600 - Technik, Medizin, angewandte Wissenschaften
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ISBN
ISSN
1523-0406
1545-0465
1545-0465
Language
English
Created during FHNW affiliation
No
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Publication status
Published
Review
Peer review of the complete publication
Open access category
Closed
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Citation
BEREUTER, Pia und Robert WEIBEL, 2013. Real-time generalization of point data in mobile and web mapping using quadtrees. Cartography and Geographic Information Science. 29 April 2013. Bd. 40, Nr. 4, S. 271–281. DOI 10.1080/15230406.2013.779779. Verfügbar unter: https://irf.fhnw.ch/handle/11654/38561