Résumé
This work is interested in observation, in scientific knowledge acquired from what is perceived (Link making Sense) from a complex systemic world. The approach leads to proposing the concept of imprint within the interdisciplinary framework "System - Reality - World as perceived - Model" and testing it against data, then to proposing systemic ontology as an approach. This makes it possible to deploy the Link making Shape from the systemic domain to the world as perceived, to analyze and describe the relevant part in the data and to show how the whole of this mostly symbolic work can contribute, with respect to semantic, technological and digital aspects, to better control data collection and analysis and Earth observation as a whole. Illustrations mainly focus on oasis. This work discusses its contribution to constructing an observation science.