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(59.235,56.369),
lon2=c(-5.123,-4.698), lat2=c(60.258,59.197) )
library(geosphere)
p1 <- matrix(c(df$lo
On Jul 23, 2010, at 8:58 AM, Mafalda Viana wrote:
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 geometry, midpoint
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 geometry, midpoint considering the great circle
distance or similar.
Th
On Jul 23, 2010, at 7:13 AM, Mafalda Viana wrote:
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 to find an answer in th
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