Change overpass filter to only look for contact:webcam.

[wmbr]

I found that many webcams are only tagged man_made=surveillance and not surveillance=webcam (e.g. https://www.openstreetmap.org/node/9569388016)
I think simply filtering by contact:webcam=* is sensible since having a public feed is ultimately the relevant criterion.
Also I narrowed it down to only nodes (can webcams be areas or paths? how would we display these?)

[wvanderp]

Thank you so much for bringing this to my attention and for providing a fix.
I will merge this to give you the recognition you deserve, and this also triggered many changes for me.

I ran the old and new queries in Overpass, which returned a different set of cameras. So I thought, "Why Not Both?" so I combined the queries to go from 1000 webcams to 5000. so, thanks for mentioning this.

Overpass has the center output type that returns all elements as a node in the center of the thing. So I will use that.

Lastly, I have the query in the repo's root and the URL you edited, so I now read the file at the root.

You can see all the changes you triggered in 44df2db

I want to thank you again. you both found an issue and fixed it. not many people take the time to do that.

[wmbr]

Thanks for your kind words :)