MarsSI (Acronym of MARS Système d’Information) is a web Geographic Information System application which allows the managing and processing of Martian orbital data. From this application, the users will be able to easily and rapidly select observations, to process raw data via proposed automatic pipelines and to get back final products which can be visualized under Geographic Information Systems like ARCGIS and QGIS. Moreover MarsSI also proposes an automatic stereo-restitution pipeline in order to produce Digital Terrain Models (DTM).