Thanks Paul, I did find the mailing list and am using the following proj4 definition for both my shapefile and imagery data. It seems to work in R so I am happy with the result.
+proj=tmerc +south +ellips=WGS84 +datum=WGS84 +lon_o=31 +k_0=1 +units=m +no_defs As per usual I found the solution no long after posting to this list. In future I will post to an imaginary list :-) and hopefully the answer will follow. Many thanks, Wesley >>> Paul Hiemstra <[email protected]> 05/06/09 10:41 AM >>> Hi Wesley, A good source of information in regard of projections is the proj4 mailing list: http://lists.maptools.org/mailman/listinfo/proj cheers, Paul Wesley Roberts wrote: > Dear Colleagues, > > I have a data set which is projected using the following projection, > Hartebeeshoek94 Projection Gauss Conform LO31. This is a local projection > used in South Africa. So far, I have only been able to find the EPSG code for > the projection from http://spatialreference.org/ref/epsg/2054/ . I am > actually looking for the Proj4 definition as the library in rgdal does not > contain any information regarding the projection. Using the following command > I found no information for the specified code > > >> poly <- readShapePoly("PCA_AreaOne_2_water_EPSG.shp", IDvar="cat", >> proj4string=CRS("+init=epsg:2054")) >> > Error in CRS("+init=epsg:2054") : no options found in 'init' file > > Could someone please provide me with the full proj4 definition as the spatial > reference site does not seem to have it. > > Many thanks and kind regards, > Wesley > > > > > Wesley Roberts MSc. > Researcher: Earth Observation (Ecosystems) > Natural Resources and the Environment > CSIR > Tel: +27 (21) 888-2490 > Fax: +27 (21) 888-2693 > > "To know the road ahead, ask those coming back." > - Chinese proverb > > > > > -- Drs. Paul Hiemstra Department of Physical Geography Faculty of Geosciences University of Utrecht Heidelberglaan 2 P.O. Box 80.115 3508 TC Utrecht Phone: +3130 274 3113 Mon-Tue Phone: +3130 253 5773 Wed-Fri http://intamap.geo.uu.nl/~paul -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. _______________________________________________ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
