[R] transform shapefiles in UTM to lat/long

Dylan Beaudette dylan.beaudette at gmail.com
Tue Mar 21 19:50:58 CET 2006

On Tuesday 21 March 2006 08:13 am, Fredy O. Mejia wrote:
> Dear all:
> I have a shapefile in UTM coordinate system and I would like to transform
> it to Lat/Log coordinates (WSG84).  The package PBSmapping contains
> function convUL to transform between the two coordinate systems when data
> is in the form of a data frame with attributes specifying the coordinate
> system. However, when shapefiles are imported using function read.shape
> (package maptools), a list instead of a data frame is generated.  I could
> extract all the polygons in the list and transform them, individually, but
> I hope there is an easier way of doing that.  Besides, the shapefile i'm
> trying to convert has two different UTM zones (is from Guatemala, and it
> covers zones 15 and 16).  Any sugestions would be greatly appreciated.
> Thanks,
> Fredy
> 	[[alternative HTML version deleted]]


I would recommend performing the inverse projection with the GDAL/OGR library 

Dylan Beaudette
Soils and Biogeochemistry Graduate Group
University of California at Davis

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