Control boxes locks (monitoring landscape)

This file contains locks within the control boxes of the measuring network for the monitoring landscape. These locks are monitored every four years. The status of the locks is assessed by viewing aerial photos and then get a certain status. The results are compared to those of the monitoring of the measuring network locks. Within the measuring network, the province of Groningen has established policy for the preservation of these locks. The aim is to gain insight into, among other things, the effectiveness of the policy.