Longitude errors in flight planning of mission planner
Everyone and especially Michael,
I believe that APM mission planner has an error in calculating flight plans in terms of correcting for longitudinal distances with respect to latitude. For instance, if you create north south flight lines in flight planner on the equator, the line spacing between lines will be correct. But as your flight plan moves off from the equator, the distance between divisions of longitude decreases, and I don't believe this is properly corrected for in 1.1.86 version of mission planner. A north south flight plan with 100m line spacing on the equator will be 100m, but in Fairbanks Alaska it will be 230 meters.
Replies to This Discussion
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DeveloperPermalink Reply by Michael Oborne on -
cn you give me a example? ive tested and cant find an issue. all my functions include lat scaling.
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DeveloperPermalink Reply by Michael Oborne on -
The Haversine formula, http://www.movable-type.co.uk/scripts/latlong.html
is the formula used
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DeveloperPermalink Reply by Michael Oborne on -
ok, i see what you mean now
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DeveloperPermalink Reply by Michael Oborne on -
im not sure what it is, but it doesnt do it every time.
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Permalink Reply by Cliff Gill on -
That seems particularly strange, that it is intermittent? Once I noticed the issue today on a project located about 37 north latitude, I tested one on the equator and in Fairbanks Alaska to confirm the issue, and the equatorial distance was correct, but both the Fairbanks and California plans were incorrect and progressively so as the latitude increased. California distance was around 124m when it should have been 100m, and Fairbanks was 235m when it should have been 100m. Note that it only applies to off equatorial locations and only for north south flight lines (I probably entered 0 for an angle, but I don't think I tried 180?), not east west.
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DeveloperPermalink Reply by Michael Oborne on -
my first though is it might have to do with zoom level, but i cant confirm that
if you find a way to make it happen every time, im intrested. otherwise im chasing my tail.
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