Nowadays, several TeraBytes of fresh geospatial data are created every single day by sensors mounted on spacecraft observing the Earth. In this course, we will start from an introductory level to dive into this massive stream of data, in order to understand their features, their meaning, and their disruptive potential. Our students will learn the basic concepts of Earth observation, the data produced by the different sensing systems, how to analyse and process such data in a geospatial environment. The course will illustrate a range of processing and analysis techniques, commonly applied in various contexts to achieve the desired geospatial information - out of massive geospatial "data lakes”. Special attention will be devoted to the multi-billionaire joint programme between the European Union and the European Space Agency named Copernicus, its business model, and the societal applications it addresses.