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map calibration file
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kruch
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Joined: 02 Jul 2006
Posts: 5662

PostPosted: Thu Oct 04, 2018 6:08 pm    Post subject: Reply with quote

drivetrdr wrote:
I deleted MMPLL, MMPXY, left only points section (4 points) and TB works fine. I have hard map and I need to calibrate it. So 4 corner points is not enaugh.


Sorry I do not follow - you left 4 points, TB works fine, so 4 points are enough, right?

TB parses calibration from top to bottom, first it parses Point lines, then, when it finds MMPLL and MMPXY it drops info from Points and uses just MMPXY,LL info.

I am not sure but i think there were maps with incomplete Ozi-format calibration missing MMPXY/LL, that is why Points are parsed, but just as a fallback for this case. Otherwise, MMPXY/LL is considered superior info for calibration.

TB parses all Points / MMPXY,LL lines, but in the end, it will use only corner points in its internal calculations.
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drivetrdr



Joined: 29 Sep 2018
Posts: 8

PostPosted: Sun Oct 07, 2018 1:27 am    Post subject: Reply with quote

I have map coords offsets. So even if I ideally calibrate map for one dot (due to changing all corner points rateably), I still will have (I get) offsets in other dots. I needs in more then four points for my map.[/code]
Basically this is why I choose TB, because TB use map format which can handle many calibration points. But not only for this. TB is Great Laughing
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kruch
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Joined: 02 Jul 2006
Posts: 5662

PostPosted: Sun Oct 07, 2018 6:26 pm    Post subject: Reply with quote

Your map may be using projection and/or geodetic datum TB does not support. Or there is a mismatch between actual map projection/datum and what you use for calibration.
That could explain those offsets.
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