The 3C app (Crowd Cover Classification) is an experiment which started during the ESA Living Planet Symposium 2016 within the context of EO Open Science. The goal is to explore the potential of common technology (smartphones) for participatory land cover classification, using Sentinel data. Results will appear on dedicated websites:

- http://eoopenscience.esa.int/esa_3c_mosaic.php
- http://lps16.esa.int/esa_3c_mosaic.php