Open Street Map has the option to add the location, type and viewing angle of surveillance cameras.
Peter wrote about adding the cameras in his neighbourhood to the map, and says ‘we didn’t have to walk far‘ to add 47 cameras, including his own door bell. Cameras are added to Open Street Map but not shown in the usual map interfaces. The Open Street Map wiki does list a number of projects that render this information. These projects have different areas of focus and different selection criteria for information included it seems. One of them that seems most comprehensive is Surveillance Under Surveillance.

It shows about 3500 cameras listed in the Netherlands, surely a tiny fraction of the total.

And only a handful in my city, none in my neighbourhood. Again, a low number far from reality.

This reminds of a game that, I think Kars Alfrink and/or Alper Çuğun conceptualised, where you had to reach a destination in Amsterdam avoiding the views of the cameras along the way. It also reminds me how a former colleague had some basic camera detection device in his car years ago that became useless as surveillance cameras at private homes increased in numbers. It detected not just speeding camera signals, but also all those other cameras. At some point driving down a residential street, especially in more affluent neighbourhoods, the warning noises the device made were constant.

I’ll be on the lookout for cams in our area. There are I know two in our court yard (one on our frontdoor, not connected though, and one on a neighbour’s frontdoor).