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EPSG codes for LO31 WGS84 projection data

4 messages · Wesley Roberts, Paul Hiemstra, Tomislav Hengl

Original
Wesley Roberts
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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
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
Paul Hiemstra
# 
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:

  
    

      
      
    

  


  


      

    

    

      
      

        


  

        

      Wesley Roberts
    

    

      
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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

            

      
      
      
    

        
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:

            

      
      
      
    

        
-- 
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