[visad] ppi plot in visad

To: visad@xxxxxxxxxxxxxxxx
Subject: [visad] ppi plot in visad
From: "RAJESH SINHA" <rajeshs@xxxxxxxxxxxx>
Date: Mon, 6 Aug 2007 20:00:21 +0530

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