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script to transform utm data to lat-long data
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| # ref:https://sites.google.com/a/lakeheadu.ca/yong-luo/blog/convert-utm-to-longlat-in-r | |
| library(rgdal) | |
| # prepare UTM coordinates matrix | |
| utmcoor<-SpatialPoints(cbind(utmdata$X,utmdata$Y), proj4string=CRS("+proj=utm +zone=30")) # UTM zone Central Thailand: 47P | |
| #utmdata$X and utmdata$Y are corresponding to UTM Easting and Northing, respectively. | |
| #zone= UTM zone | |
| # converting | |
| longlatcoor<-spTransform(utmcoor,CRS("+proj=longlat")) |
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