It would be nicer to convert directly the entire shapefile object to long/lat
coordinates but if that is not possible, I will convert the other points to UTM.
Hence, I am playing around with rgdal.
library(rgdal)
SP <- SpatialPoints(cbind(32.29252, -0.3228500),
proj4string=CRS("+proj=longlat"))
spTransform(SP, CRS("+proj=utm +zone=36"))
> spTransform(SP, CRS("+proj=utm +zone=36"))
SpatialPoints:
coords.x1 coords.x2
[1,] 421274.4 -35687.37
Coordinate Reference System (CRS) arguments: +proj=utm +zone=36 +ellps=WGS84
This result corresponds with what I get when using convUL() but my map of that
area in UTM coordinates does not extend to the negative.
An external program converts the point to x=420994 y=9964407 which also seems
correct with respect to the map. Fore sure, I am using the function wrongly
somehow. Can anyone give me a hint?
That's very much appreciated!
Thanks,
Werner
----- Ursprüngliche Mail ----
Von: Werner Wernersen <[EMAIL PROTECTED]>
An: [EMAIL PROTECTED]
Gesendet: Dienstag, den 19. August 2008, 20:28:29 Uhr
Betreff: converting coordinates from utm to longitude / latitude
Hi,
is there a function in R to convert data read with read.shape and which is
originally in UTM coordinates into longitude / latitude coordinates?
I found the convUL() function from the PBSmapping package but I have no idea
how I could apply that to the read.shape object.
Many thanks,
Werner
______________________________
fügt über einen herausragenden Schutz gegen Massenmails.
http://mail.yahoo.com
__________________________________________________
Do
ragenden Schutz gegen Massenmails.
http://mail.yahoo.com
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
