Using a GPS

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Using a GPS

Post  jt on Sun Jun 07, 2009 9:57 pm

Last time out I used my garmin to mark my locations - when I downloaded the track it was like a bowl of spagetti - all over the place, yet I felt I had followed a set pattern. Any suggestions on keeping to a tight pattern in the bush areas?
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jt
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GPS plotting

Post  MS on Sun Jun 07, 2009 10:30 pm

HI
You may have walked in straight lines but the inbulit error or unit accuracy is what you are plotting also, if you go under tree cover the signal can get worse and when you get home and download your plot for the days detecting it looks worse than it really is.
Regards mark
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GPS & Estimated Positional Error (EPE)

Post  forester01 on Mon Jun 08, 2009 6:07 pm

G'day MS

Mark has it right. GPS is NOT correct to within metres of required position - unless you're a member of the current allied military coalition in which case you'll receive data through your specialised GPS system which is considerably more accurate - and geared toward accurate delivery of artillery fire, airforce ground support etc etc.

I recall reading some months ago whereby a member had suggested marking a burial plot for a nugget or similar treasure with a GPS 'mark'. No - it doesn't work because of the metre by metre wide inaccuracy of the GPS system. Far better to mark a clearing then mark a tree or other feature then to measure distance to the buried cache.


Mike
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Search patterns - any suggestions

Post  jt on Mon Jun 08, 2009 7:28 pm

To Mark & Mike
Thanks for the clear clarifications.... any reply is sure to help gain knowledge , especially from experienced persons like yourselves.
John
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