Data produced as part of ESA Terrafirma project. The PSI processing has been carried out by TRE (). PSI processing used 70 scenes of ERS-1 ERS-2 data. Number of of points = 68504, Point density = 194 PS/km2, Reference point location is lon: -2.0281327, lat: 53.1090396. 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.