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Thou shalt confirm thine airspeed on final, lest the earth rise up and smite thee. (pre-landing checklist, v1)

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Messages - dikivan2000

#1
Plan-G / Re: Range rings not being _range_ rings
February 16, 2020, 06:31:45 PM
Quote from: jank1 on February 15, 2020, 10:25:24 PM
This is how the Earth is displayed on a plane surface.
Take a look at this webside and you wil understand the problem.

https://thetruesize.com/#?borders=1~!MTY3NzEzOTE.ODM0MzM1MQ*MjkwMTkzNDk(MTUwOTc0NzQ~!CONTIGUOUS_US*ODM2ODc4Mg.MjQzMjk1NDg(MTc1)MA~!IN*NTI2NDA1MQ.Nzg2MzQyMQ)MQ~!CN*OTkyMTY5Nw.NzMxNDcwNQ(MjI1)Mg

I understand the concept of plotting a sphere on a flat surface - that, however, only justifies the shape of the range rings. The curve itself should still always connect the points at the same distance from the origin, which is not the case here.
#2
Plan-G / Range rings not being _range_ rings
February 14, 2020, 05:50:27 PM
Greetings! I might be missing something, however the verification seems so obvious I think it might be a bug. Near the equator, the range rings work perfectly; however, near the poles they start being inconsistent. From what I managed to deduce, the north and south distances are fine, but east/west lines do not depict the right distance. Find the screenshots attached.
P.S. Either that or range/bearing tooltip is lying.