I am doing my master thesis about drones and the safety standards in the airfield in germany. We have in the university chair a flight warehouse where we fly and develop drones and my job is to make the whole space safe like implementing surveillance sensors that detect people in the airfield and therefore prohibit flying. This job is now done but I currently have to write a report and as an introduction I would like to write about safety standards in airfields.
I have been searching for a long time about these standards especially for indoor fields/warehouses (e.g. ISO standards or rules for field height/field safety) but unfortunately i only found this so far (dealing with drones in German airspace):