Un metodo fotogrammetrico speditivo per il rilevamento e il monitoraggio di frane

This paper proposes the quick use of the photogrammetric triangulation to survey and monitor landslides, by using non-metric images taken from ground and/or from helicopter by a CCD. Is then possible achieve with rapidity and precision a 3D numerical model of the landslide morphology, as soon as it has happened, and monitor with data processing procedures its spatial evolution in the time, on the base of images and/or measures later acquired. The application of the non-metric triangulation (bundle adjustment) allows to dramatically reduce the control point number to acquire with topographic instrumentation, limiting or even eliminating the times/costs for measures on inaccessible points and/or in no-safety conditions. The experimentation to a case study has shown the good obtainable precision with this quick method of digital photogrammetry. Considering the very short operation time, it could also be applied for the precision survey of a landslide to plan the emergency stabilization operations.