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Article

Morphing of Building Footprints Using a Turning Angle Function

by 1,*, 2 and 1
1
School of Resource and Environmental Sciences, Wuhan University, Wuhan 430072, China
2
Department of Geography and Atmospheric Science, University of Kansas, Lawrence, KS 66045, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Wolfgang Kainz
ISPRS Int. J. Geo-Inf. 2017, 6(6), 173; https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi6060173
Received: 27 April 2017 / Revised: 9 June 2017 / Accepted: 13 June 2017 / Published: 14 June 2017
We study the problem of morphing two polygons of building footprints at two different scales. This problem frequently occurs during the continuous zooming of interactive maps. The ground plan of a building footprint on a map has orthogonal characteristics, but traditional morphing methods cannot preserve these geographic characteristics at intermediate scales. We attempt to address this issue by presenting a turning angle function-based morphing model (TAFBM) that can generate polygons at an intermediate scale with an identical turning angle for each side. Thus, the orthogonal characteristics can be preserved during the entire interpolation. A case study demonstrates that the model yields good results when applied to data from a building map at various scales. During the continuous generalization, the orthogonal characteristics and their relationships with the spatial direction and topology are well preserved. View Full-Text
Keywords: turning angle function; morphing; building footprint; continuous generalization turning angle function; morphing; building footprint; continuous generalization
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MDPI and ACS Style

Li, J.; Li, X.; Xie, T. Morphing of Building Footprints Using a Turning Angle Function. ISPRS Int. J. Geo-Inf. 2017, 6, 173. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi6060173

AMA Style

Li J, Li X, Xie T. Morphing of Building Footprints Using a Turning Angle Function. ISPRS International Journal of Geo-Information. 2017; 6(6):173. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi6060173

Chicago/Turabian Style

Li, Jingzhong, Xingong Li, and Tian Xie. 2017. "Morphing of Building Footprints Using a Turning Angle Function" ISPRS International Journal of Geo-Information 6, no. 6: 173. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi6060173

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