On behalf of several provinces NEO has monitored whether trees disappeared in areas that fall under the nature conservation law. The enforcement of this law is difficult, as areas are enormous and human resources limited. By monitoring the trees in an automated way NEO delivers only the most relevant changes to the client to follow up in the field. The nationwide tree database of the Boomregister that was developed by NEO is used as baseline. Satellite data is used as source for the yearly updates. We use deep learning algorithms to signal where trees have disappeared, and filter them to only keep the most relevant ones.