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Outdoor & Recreation
Safety and Survival
Alternative to Epirb, water, roof load, roof tents and temperature
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<blockquote data-quote="user 4386" data-source="post: 289535" data-attributes="member: 4386"><p>Forgot to include a test a mate did - note the accuracy (points plot within road boundaries, accuracy around 5 m as with any GPS device) - be warned, despite removal of the "selective availability" that the USA used to use for defence purposes to introduce survey errors, you can still suddenly get a 100 m shift within seconds on any GPS, and the change can stay around for many readings - I have tested by monitoring against a base station GPS. Damned annoying when I am mapping and come back to the same shaft to continue and find it has shifted 110 m (hence two GPS, one in a single position all day to monitor drift so that I can correct the readings in the one I am surveying with later). It seems to be a shift in accuracy not instrument precision for the statisticians out there.</p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/4386/1478843536_spot.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="https://www.prospectingaustralia.com/forum/img/member-images/4386/1478843536_spot_coords.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>This entire file will download as a CSV file, which has an advantage over many GPS if you want reading times.</p></blockquote><p></p>
[QUOTE="user 4386, post: 289535, member: 4386"] Forgot to include a test a mate did - note the accuracy (points plot within road boundaries, accuracy around 5 m as with any GPS device) - be warned, despite removal of the "selective availability" that the USA used to use for defence purposes to introduce survey errors, you can still suddenly get a 100 m shift within seconds on any GPS, and the change can stay around for many readings - I have tested by monitoring against a base station GPS. Damned annoying when I am mapping and come back to the same shaft to continue and find it has shifted 110 m (hence two GPS, one in a single position all day to monitor drift so that I can correct the readings in the one I am surveying with later). It seems to be a shift in accuracy not instrument precision for the statisticians out there. [img]https://www.prospectingaustralia.com/forum/img/member-images/4386/1478843536_spot.jpg[/img] [img]https://www.prospectingaustralia.com/forum/img/member-images/4386/1478843536_spot_coords.jpg[/img] This entire file will download as a CSV file, which has an advantage over many GPS if you want reading times. [/QUOTE]
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Outdoor & Recreation
Safety and Survival
Alternative to Epirb, water, roof load, roof tents and temperature
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