[gradsusr] lon lat to km

[wendi harjupa]

Dear Sir/Madam

I need help
I have problem with grads command,
I am not well understand with command gr2XY,

Actually I want to convert the lon 100  to 101, and lat 0 to 1 to distance
(km)
let think that lon 100 is 0 km, and lat 0 is 0 km,

what command I can use to convert lon and lat to km?

Thank you very much for your help

best regards,
-- 
-------------
Wendi Harjupa. ST
Shimane University Graduate School of Engineering Sciences
Department of Electronic Control Systems
Remote Sensing Laboratory
s119447
Cellphone : +81-080-4268-6676
email : wendi at rslab.riko.shimane-u.ac.jp
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