[gradsusr] convert location to km

[wendi harjupa]

Dear Every one

I need a help,

I have two different objects in different location,
for example
Object 1 --- > lon=135.2  lat=34.7
Object 2---- > lon=135.2  lat=34.9

Is there any function in Grads that can convert the distance of those
objects to km/m?

Thank you very much for any solutions

Best regards,
wendi
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