The Venice lagoon (Italy) is one of the largest lagoons in Europe, with a high environmental and socio-economic significance, also linked to the historical and cultural value of the city of Venice. In this presentation, remote sensing is used to look at the spatial and temporal variability of some environmental processes and to provide a visualization of such variability. Remote sensing facilitates the acquisition of spatial data and the interpretation of its space-time properties, providing access to the geometric patterns that can not be obtained using point measurements, particularly in a dynamic environment such as a coastal lagoon. Applications on the Venice lagoon watershed, where aquifer pollution may have fundamental impacts on the water quality of the lagoon, will also be presented.