| convUL {PBSmapping} | R Documentation |
Converts coordinates between UTM and Lon/Lat.
convUL (xydata)
xydata |
data frame with columns X and Y. |
xydata must possess a projection attribute that
identifies the current projection. If the data frame contains UTM
coordinates, it must also have a zone attribute equal to a
number between 1 and 60 (inclusive). If it contains
longitude/latitude coordinates and the zone attribute is
missing, the function computes the mean longitude and uses that value
to determine the zone. The longitude range of zone i is
-186 +
6i < x <= -180 + 6i degrees.
This function converts the X and Y columns of
xydata from "LL" to "UTM" or vice-versa. After
the conversion, it adjusts the data frame's attributes accordingly.
A data frame identical to xydata, except that the X and
Y columns contain the results of the conversion and the
projection attribute matches the new projection.
#--- load the data (if using R) if (!is.null(version$language) && (version$language == "R")) data(nepacLL) #--- set the zone attribute attr(nepacLL, "zone") <- 9 #--- convert and plot the result nepacUTM <- convUL(nepacLL) plotMap(nepacUTM)