NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.

[visad] ppi plot in visad

hai ,
  I am trying to make a ppi  plot using visad . how i can increase or
decrease radius of a circle. i want a to plot a polar chart of 1024*1024
pixel area.  how it is defined in visad