Persistent Scatterers Interferometry is applied at provincial / national scales, generating ground displacement and infrastructure stability information at very competitive measurement accuracy and pricing, when compared with any other geodetic techniques.
The Ottawa-Montreal corridor (9.2 million targets) was monitored for ground and infrastructure stability during 2015-2020, using Sentinel-1 data.
In the Ottawa region, north of Mer Bleue Conservation Area (Orleans), subsidence affecting the residential area was detected
An example of a displacement profile in the Orleans area is illustrated below; measured deformation rate is around half centimeter/year
Local subsidence areas were detected in southern and northern Gatineau
Southern Gatineau local subsidence illustrated at original monitoring resolution (5 x 20 meters squared).
Local subsidence area in northern Gatineau. Subsidence rates of around 1 centimeter/year were observed.
Example of a displacement profile in northern Gatineau
A large number of local subsidence areas were detected in the area of Montreal and environs
The area containing the cities of Saint Julie and Saint Amable are affected by subsidence
Local subsidence areas in Old Montreal. Subsidence rates of around 2 centimeters/year were observed.
Example of a displacement profile in Old Montreal