Aplicación del Láser Escáner Terrestre (TLS) a la modelización de estructuras: precisión, exactitud y diseño de la adquisición de datos en casos reales

Terrestrial laser scanner is employed in a wide range of engineering applications, because of the specifications of TLS units and the good precision reached. This paper presents the application of TLS to structures and walls modeling. It analyzes the factors that influence final accuracy: cloud registration, target type and the effect of scanning angle and distance. A field test was performed with calibrated panels, obtaining real precision and accuracy values for the most common distance ranges in engineering. We propose and validate the usage of pattern graphs relating precision and accuracy versus distance and scanning angle for field survey design. The application of pattern graph in the design of field scan surveys for dam movement control is also presented. Recommendations are made for the application of TLS technique to large structures.