The city of Enschede hired a company to keep track of how crowded its city center was. The company they hired used Wi-Fi-tracking to measure how many people were present at one time. The city and two companies that were involved in the measurements had access to the data. The data was used over a period of years (2017-2020) which overlapped with the EUs General Data Protection Regulation (GDPR) The city has filed an appeal against the ruling because they do not consider the data to be their sole responsibility.”]