MoapaPk wrote:I use a dedicated garmin 62stc. But there is much to be said for a simple smartphone with an external battery pack to put it past 3hrs of use. Smartphones typically have crappier antennas and inferior chipsets, but if you stay out of deep canyons and mainly go up peakbagging lumps, the smartphone-battery-pack combo may be lighter and cheaper. The mapping options for smartphones are often better.
Google earth has a good feature for elevation change, using the digital elevation model available (upload the track, then right-click on elevation profile, after setting terrain to most detailed).
tobe945 wrote:Will the GPS counterpart of a cell phone even work without a cell phone signal or wifi signal?
req wrote:tobe945 wrote:Will the GPS counterpart of a cell phone even work without a cell phone signal or wifi signal?
Yes, quite effectively, but you'll want to take steps to:
1. Preserve battery life
2. Download maps beforehand
For example, on an AT&T iPhone 4, locking the SIM card with a PIN will prevent it wasting battery looking for a cell tower while still giving you access to the GPS hardware. I then use Gaia GPS to download topo maps before I leave the house. The AT&T iPhone 5 seems to have a bug where the SIM trick doesn't work, so you'll need to figure out what works for your device.
Plenty of details here: http://adventurealan.com/iphone4gps.htm
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