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Dear R users, I need to find the coordinates for the point (midpoint) located half way between two pairs of coordinates (lon1,lat1 and lon2,lat2) assuming a straight line between them. What would be the best way? I tried...
The arithmetic mean was my first approach and to nearby points it doesn't make much difference. However, when the distance between the 2 points gets bigger this is no longer accurate enough. So yes, I was thinking on spherical...
Dear David and R users, Thank you very much for the help. There is a function in the suggested package called "midPoint" which does what I need. df<- data.frame(lon1=c(-4.568,-4.3980), lat1=c(59.235...
Dear Mark, Thanks for your reply. I attach one of my plots as an example (e.g.Mafalda) to show what I want. If you notice in the plot the x-axis has a funny scale (0, 13, 28...) and...
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