Using Laser Scanning to Produce 3D Isovists of Real Environments

Dalton, Ruth, Dalton, Nick, Peverett, Iwan, Clinch, Sarah and Davies, Nigel (2015) Using Laser Scanning to Produce 3D Isovists of Real Environments. In: The 10th Space Syntax Symposium (SSS10), 13th - 17th July 2015, London.

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Abstract

This paper is essentially a technical guide to laser scanning for real-world, two-dimensional isovist creation. The paper covers what is laser scanning, good scanning practice and then describes how to use the resultant data to recreate an isovist directly from noisy, real-world scan data. We will demonstrate how two different isovists can be created: the traditional 2D isovist, and a weighted isovist generated from the surface of a sign, display or shop frontage. This second isovist is weighted by the viewing angle of someone looking at the sign or display. Future areas of research identified from this paper include: work on 3D isovist representations and methods to efficiently process the point cloud data (produced by the scanner) in order to calculate a volumetric isovist; using the colour data, also captured by the scanner, in order to generate potential, colour-based, isovist representations; future work on the placement of signs and displays for optimal efficacy.

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