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. 2012 Aug 14;12(8):11249–11270. doi: 10.3390/s120811249

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© 2012 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 13. — Example of cross-section extraction for the N. Ikonio tunnel based on the TLS (a) and total station (b) survey data. Note the lack of point information in the top left corner of plot (b) due to the ventilation duct system.