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#162972 - 02/28/12 06:43 PM Re: Dumb question on GPS [Re: squark]
BarryP Offline
member

Registered: 03/04/04
Posts: 1574
Loc: Eastern Idaho
“I used to get in fights with my boyfriend when his GPS distance didn't match the distance I estimated from the map. Nice to have some backup on why. …”

Well, a more major error is keeping your GPS in your shirt pocket or hanging around your neck. Some funny things happen with antennas next to your body. I finally got more accurate readings by putting the GPS in the backpack’s far outside pocket.

-Barry

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#162984 - 02/28/12 09:41 PM Re: There's an app for that, Re:Dumb question on GPS [Re: oldranger]
OregonMouse Offline
member

Registered: 02/03/06
Posts: 6405
Loc: Gateway to Columbia Gorge
I agree with oldranger--we need a translator for this thread!

Which is why I don't have a GPS!
_________________________
May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey

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#163106 - 03/01/12 11:50 PM Re: There's an app for that, Re:Dumb question on GPS [Re: BZH]
billstephenson Offline
Moderator

Registered: 02/07/07
Posts: 3892
Loc: Ozark Mountains in SW Missouri
Quote:
You could skip points with small distance changes, what might be better would be to skip points where the elevation is greater than the distance change. That would be walking up a slope greater than 45°. I guess anyway you do it, you might have to play around with the limits on your filter until you get good results.


Thanks BZH.

I think you're right, skipping points where the elevation is greater than the distance change is probably the way to filter it.

If I make it so we can adjust the limits on the distance change and elevation change we can probably fine tune it so it ignores mostly redundant data that contains variations on the same location.

I might be wrong, but it looks like BaseCamp might be rounding off the lat/longs before they compare them for distance. If you're looking for matches that would increase the number you'd find pretty quickly the more you rounded them. I might try that too.
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