Unstable slopes monitoring by means of topographic surveys at Castelsardo, Sardinia, Italy

In the village of Castelsardo (north Sardinia, Italy) numerous alarming landslides have occurred over the last few years that have affected the eastern part of the village, which is perched on a very steep hillside overlooking the coast line, carved into cliffs. In order to produce evidence of and measure possible displacements over the whole hillside or parts of it, a topographic monitoring network has been set up. Each paint of this network is monitored using traditional topographic surveys and checked with periodical surveys using a system of NAVSTAR GPS detectors. All the results obtained with the different methods have been interpreted and compared.