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Development of polygon shift method for generating 3D view map of buildings

Authors:	Shunji Murai Vivarad Phonekeo Kunihiko Ono Shigetaka Yasue

Affiliation:	1. Space Technology Applications and Research Program (STAR), Asian Institute of Technology, PO Box 4, Khlong Luang, Pathumthani 12120, Thailand;2. Geoinfo Creative, 2-4 Kanda Jinbocho, Chiyoda-ku, Tokyo 101, Japan;1. imec, Kapeldreef 75, B-3001 Leuven, Belgium;2. Department of Elektrotechniek, ESAT-MICAS, KU Leuven, B-3001 Leuven, Belgium;1. Advanced Materials Department, IPICYT, Camino a la Presa San José 2055, Col. Lomas 4a sección, San Luis Potosí 78216, Mexico;2. Instituto de Investigación en Comunicación Óptica, Universidad Autónoma de San Luis Potosí, Álvaro Obregón 64, San Luis Potosí 78000, Mexico;3. CONACYT - Centro de Investigación y Desarrollo en Electroquímica, Parque Tecnológico Querétaro s/n Sanfandila, Pedro Escobedo, Querétaro 76703, Mexico;1. Department of Mechatronics Engineering, Jeju National University, Republic of Korea, Republic of Korea;2. Department of Engineering, Dankook University, Republic of Korea

Abstract:	The authors have developed a new method termed “Polygon Shift Method” that enables the generation of a 3D view map of a city with tall buildings with a simplified procedure to shift a polygon and check the overlap between the original and shifted polygon. Boolean operations are applied with a newly defined “Fore or Aft” side and a “Depth Distance” that functionally express the visibility criteria or hidden point processing in the 3D view. Since the polygon shift method can be operated with a raster-based structure, the computer processing for generation of a 3D view map of buildings with shadow is simple and efficient.

Keywords:	3D view map polygon shift method shadow analysis hidden point algorithm
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