Cross exploitation of geo-databases and earth observation data for stakes characterization in the framework of multi-risk analysis and management: RASOR examples

Such thematic information over at-risk areas can be extracted from available global, regional or local scale open sources databases (e.g. ESA-Globcover, Natural Earth, Copernicus core services, OSM, . . . ) or derived from the exploitation of EO satellite images at high and very high spatial resolution (e.g. SPOT, soon Sentinel2, Pleiades, WorldView, . . . ) over territories where this type of information is not available or not sufficiently up to date. However, EO data processing, and derived results highlight also the gap between what would be needed for a complete representation of vulnerability , i.e. a functional description of the land use, a structural description of the buildings including their functional use , and what is reasonable accessible by exploiting EO data, i.e. a biophysical description of the land cover at different spatial resolution from decametric scales to sub-metric ones, especially for urban block and building information.