Changing the axis projection

Hi all,

Hopefully some one can help me. I currently have a map of a section of Antarctica. The data I am plotting is in the Antarctic stereographic projection. I am using the following command to create it:

  x_min=500000
  x_max=2350000
  y_min=500000
  y_max=2000000

  project_size=1:10000000
  scale=250000

 psbasemap -Jx$project_size -R$x_min/$x_max/$y_min/$y_max -B$scale -K > $plotfile

My problem is I want to plot this exact region and have the map look exactly the same except I want lat/lon instead of metres on the axis bars. Is there any way of doing this. Do I need to transform the coordinates to lat/lon for this to work?

Here is a link to an output ps file:

https://drive.google.com/file/d/0B9_1YzkpQ28JamJiVGpHRDJ0YUU/edit?usp=sharing

Cheers

Janosch Hoffmann

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