Fig. 4From: Radar interferometry based settlement monitoring in tunnelling: Visualisation and accuracy analysesAnimated terrestrial settlement visualisation using the triangulation method in several time steps June 30th (a), August 20th (b), October 10th (c) and November 30th 2011 (d) with corresponding position Tunnel Boring Machine (TBM) (red arrow), (Schindler et al. 2014)Back to article page