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Proceedings Paper

Organization and simplification of high-resolution 3D city facades
Author(s): Mitchell Parry; William Ribarsky; Christopher D. Shaw; Justin Jang; Nickolas L. Faust
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Paper Abstract

This paper describes an approach for the organization and simplification of high-resolution geometry and imagery data for 3D buildings for interactive city navigation. At the highest level of organization, building data are inserted into a global hierarchy that supports the large-scale storage of cities around the world. This structure also provides fast access to the data suitable for interactive visualization. At this level the structure and simplification algorithms deal with city blocks. An associated latitude and longitude coordinate for each block is used to place it in the hierarchy. Each block is decomposed into building facades. A facade is a texture-mapped polygonal mesh representing one side of a city block. Therefore, a block typically contains four facades, but it may contain more. The facades are partitioned into relatively flat surfaces called faces. A texture-mapped polygonal mesh represents the building facades. By simplifying the faces first instead of the facades, the dominant characteristics of the building geometry are maintained. At the lowest level of detail, each face is simplified into a single texture-mapped polygon. An algorithm is presented for the simplification transition between the high- and low-detail representations of the faces. Other techniques for the simplification of entire blocks and even cities are discussed.

Paper Details

Date Published: 30 July 2002
PDF: 8 pages
Proc. SPIE 4744, Radar Sensor Technology and Data Visualization, (30 July 2002); doi: 10.1117/12.488278
Show Author Affiliations
Mitchell Parry, Georgia Institute of Technology (United States)
William Ribarsky, Georgia Institute of Technology (United States)
Christopher D. Shaw, Georgia Institute of Technology (United States)
Justin Jang, Georgia Institute of Technology (United States)
Nickolas L. Faust, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 4744:
Radar Sensor Technology and Data Visualization
Nickolas L. Faust; Nickolas L. Faust; James L. Kurtz; Robert Trebits, Editor(s)

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