WGS84 conversion to UTM
Taylor, RB wrote:
Dear all, I'm a rather new user to R, so please excuse my ignorance. I understand in R there are different spatial packages that allow one to do a variety of spatial analyses. I have collected GPS in WGS84 in South Africa. I have the data in a tab-deliniated txt file (along with attribute data) and in .shp files. I want to be able to read the text file (or ascii) into R and then batch convert long lat to UTM (34 S), and then do some analyses in R. I can across the website http://r-spatial.sourceforge.net/xtra/xtra.RHnw.html#spproj, which seems quite good. But I don't seem to be able to replicate the same procedure with my files. Being fairly new to R, I am not all that familiar with the syntax so perhaps this is why I can't do it. Any help is appreciated, thanks PS I work in a windows environment -- Rob Taylor
Hi Rob,
Take a look at the package "PBSmapping".
You'll need to create a data.frame with the names X and Y and add an
attribute "projection", then just convUL :-)
See my example:
mydf <- read.table(blah, blah, blah)
names(mydf) <- c("X","Y")
attr(mydf, "projection") <- c("LL")
mydf.utm <- convUL(mydf)
Regards
EJ