On 14/02/13 16:53, Martin Koppenhoefer wrote:
2013/2/14 Frank Villaro-Dixon <fr...@villaro-dixon.eu>:
it's been some years now that this proposed feature has been in the draft
section.
I think it's now the time to RFC on this feature, what do you think ?
The future goal is to starting to import/add correctly the CCTV public
cameras in OSM.
Let me know if you have things to say ;)
https://wiki.openstreetmap.org/wiki/Proposed_features/Extended_tags_for_Key:Surveillance
Nice, finally the open burglary map comes closer ;-)
Nah, it shouldn’t be seen that way ;)
I have 2 remarks:
1. regarding guard there might be some overlap with this tag:
http://wiki.openstreetmap.org/wiki/Key:barrier:personnel
Well, the two are a bit different, I think:
-Barrier would be for "entrances" (UN, consulates, etc..)
whereas
-Guard would be more for surveillance things: power plants, etc..
Of course, normally, every building that would have a Guard, would also
have a Barrier:personnel
What do you think ?
2. Isn't there one parameter missing to deduct the actual area covered
by a camera? I'd think you needed 3 values: direction the camera
points to (in 3d, e.g. azimuth and altitude) plus the field of view
or focal length. This is of course purely theoretical because the
cameras might be able to move and most mappers won't probably be able
to add high precision orientation data (usually you will have to
estimate these values).
Yep, haven't thought of that.
Usually, site who represent these cameras
(eg: http://www.sous-surveillance.net/)
have and approximate view of the camera based only on the orientation of
the camera.
focal length (camera:focal ?) isn't a bad idea, but I think that the
most important tag is camera:direction.
cheers,
Martin
--
Frank Villaro-Dixon - PGP: 6F36914A
http://frank.villaro-dixon.eu
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