Globe Coordinate Prediction

MrHalsey

New Member
Joined
May 27, 2020
Messages
1
Office Version
  1. 365
  2. 2019
  3. 2016
Platform
  1. Windows
  2. MacOS
Hello my fellow excel people,

I'm trying to predict latitude and longitude coordinates within 2 predefined points. If this was a 2D problem then I'm sweet, but it gets tricky with the curvature of the earth (anti flat earther).

Once point A & B have been set i want to basically be able to predict as many in between points as i wish.

An example being i want a total of 11. This bit i have nailed, but just adds complexity.

What I'm struggling with is taking the earth curvature into consideration. Technically i find the midpoint but when I plot it onto a map it doesn't follow the correct logic.

I have a calculation for latitude and one for longitude. No difference just the reference. The example will only show 1 as its the same.

Obviously i have to factor in the earths radius - 6,371KM. Found lots online but nothing specifically for excel.

Heres a short file to visually see.

Point APoint B
LAT A-13.90061LAT B
LON A-137.50836LON B
PointLATFormula
1-13.90061=C3
2-14.031651=C8-((C$3-F$3)/10)
3-14.162692=C10-((C$3-F$3)/10)
4-14.293733=C12-((C$3-F$3)/10)
5-14.424774=C14-((C$3-F$3)/10)
6-14.555815=C16-((C$3-F$3)/10)
7-14.686856=C18-((C$3-F$3)/10)
8-14.817897=C20-((C$3-F$3)/10)
9-14.948938=C22-((C$3-F$3)/10)
10-15.079979=C24-((C$3-F$3)/10)
11-15.21102=F3

Using google mymaps we can visually see my predicted coordinates (navy) verses a correct line (red), additionally a middle point (green). Here we can see the inaccuracy of my results.


Screenshot 2020-12-12 at 22.04.04.png


Overall, i need a formula to align my predictions with the correct line (red). Ideally in a single formula.

Thanks advance with the help.

If you require more info/explanation please say.

M
 

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