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| Subject: | Re: MobileLBSList: Importance of altitude |
| Date: |
08/16/2000 04:52:14 PM |
| From: |
Hung-Hsien Chang |
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Well... if a person is outdoors hiking and he got lost.
Darn... I think the 'z' will matter a little bit.
But, given the x/y, and a map, 'z' seems to be pretty obvious
usually the map will say somehting about z.
and 'z' matters to policeman as well.
On Wed, 16 Aug 2000, Bryan Morgan wrote:
> Yesterday, someone mentioned not only x/y positioning, but also "z" -
> altitude. I'm trying to understand why you'd need this information...are
> you interested in say tracking something on the 15th floor of a building or
> are you talking seriously high altitudes (such as aircraft, etc.)?
>
> It seems to me that if you're referring to a building height -- less than
> 200 meters -- that positioning has a long way to go. If you can locate
> something to within 50 meters on the x-y plane, that's okay for most
> applications because you can visually access your surroundings (in most
> cases). If you're trying to locate something in a building, it gets
> complicated....what if you're on the 5th floor but your device (only
> accurate to within 50 meters) tells you something may be between the 12th
> and 18th floors...obviously, not a workable solution. How is this currently
> handled, if at all?
>
> Bryna
>
>
>
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