Radar-coding and Geocoding Look Up Tables for the Fusion of GIS Data and SAR images in Mountain Areas

For merging Synthetic Aperture Radar (SAR) with georeferenced data, one usually uses processing software to orthorectify the SAR images in order to add them in a GIS. Nevertheless, this projection involves an important alteration of the information of SAR images and are often specific to some particular SAR sources. Moreover, the transformation of radarcoding data from a GIS into the radar geometry allows the use of different information sources to improve the analysis of SAR images and the result interpretation. In this paper, we propose a simple and efficient method to build two couples of Look Up Tables (LUT) allowing to code data in ground or radar geometry. This approach is applied to a high relief area in the Alps, where satellite and airborne SAR images are used for glacier evolution monitoring.