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Norwegian subsidence mapping tool launched

A new satellite mapping service that shows deformation over the entire Norwegian landscape has been launched.

The mapping tool - Norwegian Ground Motion Service, Insar Norway - allows users to see where urban subsidence and movements of unstable mountain slopes are occurring.

Called Insarnorway, the data will demonstrate how the ground expands and contracts with the seasons, and where buildings, bridges, roads and railways shift and settle due to the poor ground conditions.

Using images acquired every six days by the European Copernicus Programme Sentinel-1a and b satellites, the tool can now measure and continuously monitor all movements to within one millimetre per year at more than two billion locations across Norway.

The mapping service is open and free to everyone.

A statement said: “Mountainsides can creep slowly and silently downwards for hundreds or thousands of years before collapsing catastrophically. Many of these movements are infinitesimal: only millimetres or centimetres each year. Nonetheless, the cumulative effect of these movements can be disastrous.”

The project was bought together by the Geological Survey of Norway (NGU), the Norwegian Water Resources and Energy Directorate (NVE) and the Norwegian Space Centre.

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