from long/lat to UTM
On 10-Mar-05 Greg Snow wrote:
[...] I found a shapefile of time zones at: http://openmap.bbn.com/data/shape/timezone/ A google search on the keywords timezone & shapefile finds a few other possibilities.
b) a function which, for each name in the list, returns the TZ name
The "maptools" package can read in the above shapefile and convert it to a list of polygons and the "sgeostat" has an "in.polygon" function to see if a point is in a given polygon. The following code worked for me: [....]
Many thanks, Greg. That looks just the job, and I'll look into it. All best wishes, Ted. -------------------------------------------------------------------- E-Mail: (Ted Harding) <Ted.Harding at nessie.mcc.ac.uk> Fax-to-email: +44 (0)870 094 0861 Date: 10-Mar-05 Time: 18:10:23 ------------------------------ XFMail ------------------------------