Data produced as part of ESA Terrafirma project. The PSI processing has been carried out by TRE ([email protected]). PSI processing used 66 scenes of ERS2 ERS1 data. Number of of points = 17060, Point density = 142.175 PS/km2, Reference point location is lon: 13.505957939, lat: 43.5804927612. Terrafirma service providers have been validated by the ESA funded ValProj (http://www.terrafirma.eu.com/product_validation.htm) and passed an assessment to be a certified service provider.