If your Ozi is out it's more likely poor calibration of the map than the map itself.
Hi, my Sygig app has 'snap to track', and will sometimes have a leader line from the arrow ( position) to where it thinks I should be on the road.
Ozi just shows me the map is wrong.
Cheers
Sent from my GT-N5110 using AULRO mobile app
If your Ozi is out it's more likely poor calibration of the map than the map itself.
ded reckoning , map to ground , **** the gps.
I've had to recalibrate many hundreds of Vic 25K topos manually .. took forever to do, over the course of a few months.
And you're right on about some of the realigned roads .. depending on the dates of the maps, many roads/tracks and obstructions change over the years.
You can update that info using the desktop version of Ozi too.
This is how they got the Vic-SA border so wrong! .. to the benefit of western Victorians of course
That's why there's a misalignment of the SA border with Vic compared to the border line north of the Murray River in NSW.
I think the land lost in SA amounts to about 1/2 million sq miles or something.
.. good ol dead reckoning ... it made Victoria 'The Place to be'(or so say the number plates!)
The first GPS course I attended, run by the army for the fire service, was quite interesting. It was GPS, not SatNav, back then if there were any maps on a GPS they were quite crude and navigation was plotted using waypoints...
The instructor, a major from the artillery, said they have found there are a lot of errors in paper maps that didn't realise until the army started playing with GPS. It would appear that as a target get further and further from your location, the map based calculations don't line up with the GPS based calculations. For example, the bearing and distance to a target reads differently from paper when compared to the GPS. The further away, the more likely a bigger error occurs.
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