NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Elevation Chart (iPad/iPhone App)
From: Hewitt Schlereth
Date: 2013 May 14, 19:24 -0700
From: Hewitt Schlereth
Date: 2013 May 14, 19:24 -0700
Lu, I don't know for sure, but I suspect the app may access a topo map. Here at my place the App readings versus my Garmin 72 are:
App. 121.75 ft. 32.84* N 117.27* W
GPS. 139.2 ft. 32* 50.48' N. 117* 16.29' W
If the weather is nice tomorrow, I'll take Garmin and iPad to the shore and compare a little more.
Hewitt
Sent from my iPad
How does it derive elevation? Simply from the elevation provided by GPS or something more sophisticated?
From: Hewitt Schlereth <hhew36---com>
To: luabel---com
Sent: Monday, May 13, 2013 11:53 AM
Subject: [NavList] Elevation Chart (iPad/iPhone App)
Hey, guys, check out this two-dollar app. Since moving to La Jolla, I have been taking sights from a certain spot in a park at the shore. The spot is at the edge of a bluff over the beach and I estimated bluff height to be 40 feet, and my height of eye to be 45.5 feet. This app gives the elevation of the bluff as 41 feet. I'm five nine, so my HE is more like 46.5 feet. Even so, I'd say it's an accurate app. :-) Hewitt Sent from my iPad