11-07-2008 11:58 AM
I presume it is not correct, in other words, you aren't actually in one of those spots on Earth that is actually lower than sea level or in a submersible. Is it always giving you a negative value? Or occasionally.
I've found you do need to take note of the number of satellites before deciding whether the location is valid or not, so if you see this occasionally, I would be interested to know how many satellites you have on your dud readings.
11-07-2008 01:44 PM - edited 11-07-2008 02:35 PM
I'm not in a sub at the moment - I am over a mile above sea level.
I've only had this problem on the Bold.
I usually get 4 or 5 sats on the Bold but the neg altitude is happening everytime.
It's not just a few meters either, it's like -1000 meters and more...
Perhaps something is whacked out with the ephemeris?
11-07-2008 05:54 PM
11-11-2008 11:21 PM - edited 11-11-2008 11:24 PM
I just installed 188.8.131.52 - that seems to fix the problem with negative altitude.
It's still not perfect but at least it closer.
Who gets the kudos?
11-12-2008 04:00 AM
Apologies I did not come back to you.
When taken for a walk, my Bold showed more reasonable heights. I wonder if the negative altitude I saw was a result of it being wet? Will have to test that further.
11-12-2008 04:54 AM
11-12-2008 05:31 AM
Very good Simon, that made me laugh.
Just for clarification for those who don't know English weather shorthand, when we say it is wet, what we really mean is that it is raining. I woud never let my Bold get wet!
04-12-2009 07:17 AM
well -I also stumble across this issue - the data is provided in WGS84 system - this system assume the earth is an elipsoide... I was quite asstonished when I started to Google about WGS84 and how complicated it can get to caluclate from that GPS data the "real" altitude I know from my typograpical map...[with refference points all over the world to calculate the "real" altitudes]
I can assue you there is nothing wrong with the device ore the os - it's the coordinate system (WGS84)!