National coronation day Netherlands

The 30APPril app wasn’t able to?count?the crowds ?(buzz meter)during the crownation of the new King, because telecom providers were afraid the app would overload their wireless systems. But the police did launch the 30APPril?app for all festival venues during the crownation?in Amsterdam. The app provides a way to avoid crowded places by means of a heatmap on the streets based on real-time information, using telecom and GPS signals. Police announced that in this instance the buzz meter is removed from the app because of the service providers request for risks of congestion of data network traffic. But later it was succesfully used in other events.?The buzz meter is based on a?smartphone app?of the DFKI (Deutsches Forschungszentrum f?r K?nstliche Intelligenz in Kaiserslautern).


Push messages

The police can send push messages to people who have installed the app. The app will also provide information on matters?such as pedestrian routes, public transport stations, first aid stations, restrooms and other practical information. A similar app for crowd monitoring?was used during the Olympic Games in London in 2012.

Nijmegen Marches and celebrations
With more than two million people from the Marches Nijmegen was attended well, later in the year. To let the crowds run smoothly?in the right direction a special app for visitors of the event was created: the Marches app, with the buzz meter that?functioned well this time, excellent even.

All information – from party to safety – is available via the app. Both visitors to Nijmegen as the police can see where the biggest crowds in the city are. On that basis, the police determines its actions. It may also advise people not to go to a certain place in the city. Suppose there are reports about pickpockets, then the police are?directed there and can warn people. The buzz meter?is complementary to marquees in the city and twitter (PGLZ_evenement). Police and the festival organiser worked together in this.

The app is available for free in the App Store and Google Play. Search 4DF. When installing the app the user must agree to share location information. Police collects information anonymously and plugs it in. The buzz meter is used only during the Four Days of the Marches which are from the 13th to the 19th of July.


4DF app

Gay Pride
Saturday, July 26, 2014 starts the annual Gay Pride in Amsterdam. From Saturday, July 26th to Sunday, August 3 the police is present 24 hours a day to ensure that visitors have a fun and safe event. For a pleasant visit to Amsterdam it is convenient to install the free Gay Pride app on your smartphone.

The app provides access to a lot of?information. For example, the app shows the route of the boat parade, convenient locations such as toilets, first-aid stations, police stations and information about the program. Users can also see whether the place where they want to go already full of people or not.


Safe celebration ‘Relief of Leiden’
After ‘crowdcontrol’ funds as matrix signs and CCTV the city of Leiden and the police put?a new weapon together to help create a safe celebration of Relief of Leiden. The same app was used there as mentioned above.

iPhone Screenshot 2iPhone Screenshot 3iPhone Screenshot 4

Sources:,?Leidsch Dagblad

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