This European Standard specifies the definition of the different processing steps (levels) of images coming from Earth observation systems observing the surface of the Earth regarding the different sensor sources of the origin data. It applies at least to image products generated from the following types of sensors: ?? electro-optical (including infrared and hyper-spectral); ?? SAR (Synthetic Aperture Radar). The standard allows to identify the information depth and the used auxiliary data/information. Furthermore it allows the comprehension of image data from different sources and gives hints about the information compatibility.