[gradsusr] converting coordinates

[Satyaban BishoyiRatna]

Hi Subhadeep,
One example of w2xy (world coordinate to xy coordinate):

In case you want to draw some line and some point at a particular lat/lon of your figure, you need to know the XY coordinate for that grid point as grads doesn't take the direct lat/lon value. So by defining w2xy, your lat/lon will convert to XY coordinate, which you can use in GrADS plot.
Similarly you can follow for others.

Satyaban

On Fri, 21 May 2010 12:57:10 +0530  wrote
>Dear users,

In grads, we have many conversions like xy2w, xy2gr, w2xy, w2gr, gr2w, gr2xy, ll2xy, pp2xy.

What is the difference between these different co-ordinate systems like, world coordinates, grid coordinates, XY coordinates, LON/LAt coordinates and page coordinates ? 


Can anyone having idea about these explain me?

thanks and regards,

Subhadeep
IITM, Pune, India.

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Dr. Satyaban Bishoyi Ratna
CDAC, Pune, India

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