cyclone track

[ashish no routray]

Dear users
I am working tropical cyclone. I want to plot cyclone track through grads. I have latitude, longitude,date and time data file.
For example:
Date  time  lat    lon
---   ----  ---    ---
26     00   14.5   75.2
27     00   18.0   72.0
..
..
Please anyone is work in this and plot the track of the cyclone give idea/script for doing this.
Thanks in advance
yours sincerely
Ashish, IIT Delhi
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