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High resolution InSAR "Builtscape" improvement using LIDAR as ancillary data

In this paper, we analyze a multiple sensor data set corresponding to three-dimensional data coming from interferometric radar (InSAR) or laser ranging (LIDAR) measurements. LIDAR and InSAR are now mature technologies, and there are examples of their usefulness for urban area characterization. Unfortunately InSAR measurements show a serious disadvantage in describing built areas, due to problems derived from radar ranging. As a matter of fact, the possibility to have in the same area LIDAR data can reliably help in correcting all these effects. The advantage of LIDAR and InSAR joint use resides in exploiting the higher resolution offered by laser data and comes from the fact that LIDAR data is more expensive, and usually at the same cost we may obtain InSAR data on a much wider area than the one obtainable with a laser scanning survey