Gediminas’ Tower is part of the Vilnius Castle, the Palace of the Grand Dukes and the National Museum of Lithuania. Gediminas’ Tower dates back to the early 15th Century. In spring 2016, part of the North side of Gediminas’ Hill started sliding. The area is protected with a temporary geotextile white cover. GPS Partneris approached Geosense before Christmas 2016, with an urgent requirement to monitor a landslide taking place in this historic site. Different options were considered but it was decided to install six biaxial Wi-SOS 480 wireless tilt meters and one Gateway. As well as controlling any movement in two retaining walls - a small stone one at the top and a main masonry wall at the bottom - the aim was also to activate an on-site landslide alert. The site and the funicular are curr

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