Dear R-listers,
Here, I would like to hearing helps from you.
I have GPS data (multiple points in the geographic scale) in
longitude/latitude. I intend to calculate
distance (in kilometer) among such points and output the distance matrix in
dist class.
I have gotten some progress, but I still can not get final goal. Could
please give me any directions/advice?
This email cc. to Mr. Pierre, the author of BoSSA package.
Thanks a lot in advance.
Best wishes,
Jian-Feng, Mao
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What I have gotten are
(1) distance among GPS points could be calculated by distGPS() function in
BoSSA package. But, it can
not output the distance in dist class. And, I do not know how to convert
such distance matrix to dist class.
(2) dist() function in base R can calculate distance among units and export
it in dist class. But, it could not
be used to work on points in lon/lat.
(3) some dummy codes
# (3.1) generate dummy points in lon/lat (in degree)
points <- data.frame(lon=seq(95, 105),lat=seq(35, 45))
# (3.2) calculate distance between points using distGPS()
library(BoSSA)
Geodist<-distGPS(points)
str(Geodist)
class(Geodist)
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