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The Iqmulus urban showcase: Automatic tree classification and identification in huge mobile mapping point clouds

Böhm, J; Bredif, M; Gierlinger, T; Krämer, M; Lindenbergh, R; Liu, K; Michel, F; (2016) The Iqmulus urban showcase: Automatic tree classification and identification in huge mobile mapping point clouds. In: XXIII ISPRS Congress 2016, Commission III: International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. (pp. pp. 301-307). International Society of Photogrammetry and Remote Sensing (ISPRS): Prague, Czech Republic. Green open access

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Abstract

Current 3D data capturing as implemented on for example airborne or mobile laser scanning systems is able to efficiently sample the surface of a city by billions of unselective points during one working day. What is still difficult is to extract and visualize meaningful information hidden in these point clouds with the same efficiency. This is where the FP7 IQmulus project enters the scene. IQmulus is an interactive facility for processing and visualizing big spatial data. In this study the potential of IQmulus is demonstrated on a laser mobile mapping point cloud of 1 billion points sampling " 10 km of street environment in Toulouse, France. After the data is uploaded to the IQmulus Hadoop Distributed File System, a workflow is defined by the user consisting of retiling the data followed by a PCA driven local dimensionality analysis, which runs efficiently on the IQmulus cloud facility using a Spark implementation. Points scattering in 3 directions are clustered in the tree class, and are separated next into individual trees. Five hours of processing at the 12 node computing cluster results in the automatic identification of 4000+ urban trees. Visualization of the results in the IQmulus fat client helps users to appreciate the results, and developers to identify remaining flaws in the processing workflow.

Type: Proceedings paper
Title: The Iqmulus urban showcase: Automatic tree classification and identification in huge mobile mapping point clouds
Event: XXIII ISPRS Congress
Open access status: An open access version is available from UCL Discovery
DOI: 10.5194/isprsarchives-XLI-B3-301-2016
Publisher version: http://www.int-arch-photogramm-remote-sens-spatial...
Language: English
Additional information: Copyright © 2016 The authors. The article is distributed under the Creative Commons Attribution 3.0 License (CC BY 3.0) (https://creativecommons.org/licenses/by/3.0/).
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1543246
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