On Mon, Apr 11, 2011 at 10:58 AM, Georg Feddern <o...@bavarianmallet.de>wrote:
> Hi, > > Martijn van Exel schrieb: > > I am noticing a two major types. There's what I >> call the dome cameras [1] that live in a dome-shaped enclosure and can >> probably tilt and swivel to cover a larger area, and there's the static >> ones >> that have a more traditional camera shape [2] and are usually fixed, >> pointing in one particular direction. >> > > but do not forget the so-called "vandal dome" cameras which look like a > dome, but are only static/fixed types. > Or the 360° cameras which look like a big raindrop only ... > > * Does the distinction between dome and static cameras make sense or are >> there more major categories? >> >> > > Ask yourself the question "What info do I get with this distinction?" > I think, the only info is a "Maybe ..." > > A 'normal' mapper can not see the difference between a real PTZ-Dome or a > vandal-dome camera - you may even do not see, in which direction the latter > is mounted. > Also not the difference between a fixed mounted static camera and a fixed > mounted zoom camera. > > A lot of information going into OSM is of the 'best effort'-type, so that in itself would not deter me from putting it in if I'm not sure. From the outside, you can probably not even see if there's even a real camera in the enclosure or if it's just a dummy enclosure. Do you know how to tell fake cameras from real ones? > > * Would this be a relevant attribute to tag? I think it is. >> >> > > My conclusion: > You can not easily map the correct type of camera - and you can not > estimate the surveyed area or details without the technical data of the > camera. > So I think it is not - at least I won't trust these attributes. ;-) > Tag the manufacturer and the model instead. ;-) > That is even more difficult to establish, isn't it? I'm glad if I even spot a camera mounted 10ft above the ground, but I won't be able to make out manufacturer / model. On trust - I am a strong believer in iteratively increasing trustworthiness of information. If I tag a camera as just man_made=surveillance / surveillance:type=dome (or whatever is convenient) this information may lack sufficient quality / trustworthiness for some, but someone else, someone more knowledgeable will come along and fill in the blanks or correct what's wrong. -- Martijn van Exel http://about.me/mvexel
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