Generating 2D Building Floors from 3D Point Clouds

Anh Thu Thi Phan*, Thi Ngoc Huynh, Linh Truong-Hong

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review


Laser scanning (LS) is an effective technology for accurately capturing point clouds of visible surfaces of objects in 3D scenes. The point clouds were subsequently used for various applications, for example, generating 2D drawings of the floor or building information models (BIM) and structural inspection. However, in practice, the products from point cloud are created mainly by using commercial software, in which the quality primarily depends on users’ experiences and may contain the error caused by technician carelessness. This paper proposed a new method to automatically extract the point clouds of the floor and create a 2D drawing of floor slabs. This method analyses features of the points within cells of a 2D cell grid in the xy plane to extract candidate points of the building and each floor, while the cell- and point-based region growing segmentations were employed to extract the final points of the floor and each edge of the floor, respectively. The proposed method was successfully tested on 7.5 million points of a concrete, two-story building with 17 m long x 7m width x 7m height.

Original languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Sustainable Civil Engineering and Architecture - ICSCEA 2023
Subtitle of host publicationICSCEA 2023, 19–21 July, Da Nang City, Vietnam
EditorsJ. N. Reddy, Chien Ming Wang, Van Hai Luong, Anh Tuan Le
Number of pages9
ISBN (Electronic)978-981-99-7434-4
ISBN (Print)9789819974337, 978-981-99-7436-8
Publication statusPublished - 2023
Event3rd International Conference on Sustainable Civil Engineering and Architecture, ICSCEA 2023 - Da Nang City, Viet Nam
Duration: 19 Jul 202321 Jul 2023

Publication series

NameLecture Notes in Civil Engineering
ISSN (Print)2366-2557
ISSN (Electronic)2366-2565


Conference3rd International Conference on Sustainable Civil Engineering and Architecture, ICSCEA 2023
Country/TerritoryViet Nam
CityDa Nang City

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • 2D drawings
  • As-built BIM
  • Floor extraction
  • Point cloud


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