sebouh00 wrote: > Wouldn't I need a lock on the GPS location in order to get the altitude? I > would assume that would take more time, hence more power then just using > the barometer.
Less power + wrong answer/no answer = ? What about the altitude apps. How do they usually determine the approximate > altitude. Do they suffer from +/- 500 meter inaccuracy? > My brief Google search indicates GPS. I think not. What does your online search tell you? Mark Murphy (a Commons Guy) wrote: > > sebouh00 wrote: > > I would like to save the altitude in my app and use it to check if the > > device is at the same altitude in the future. Using GPS will not be > > applicable because of minimal power usage restrictions in my app. > > What tests have you run to determine that the barometer is > sufficiently lower power than the GPS radio? I suspect it is, but I > have never tried testing the scenario. > > > Would it be possible to do such a thing? > > IMHO, not reliably. If you are trying to get altitude accuracy +/- 500 > meters or so, perhaps. > > http://en.wikipedia.org/wiki/Atmospheric_pressure > http://en.wikipedia.org/wiki/Altimeter > > Moreover, none of this has anything to do with Android, and it smacks > of premature optimization, unless you have already implemented the > GPS-based solution and proven that the power consumption is over your > budget. > Here Mark sends you to basic information about what you're trying to do. Your next response repeats the plaint that you don't know what you're doing. This despite your having just received relevant information. I suggest that you digest the information and utility of advice already offered. In case you missed it: - Barometric pressure will not do what you're asking /per se/. - You have not provided evidence that the GPS power requirements are egregious. - You have not commented on whether comparison with a topographic map plus recalibration, as suggested, will solve your problem. I'm guessing you haven't even tried it. -- Lew -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
