[gradsusr] Plot using orthographic projection

[Oriol Ciurana]

Hello,

I need to plot with 3D spherical appearance. Is there any way to achieve it
in grads? I have heard about orthographic projection but also have heard
about latitude boundaries must span -90 to 90, which doesn't cover well my
desired area (Europe). ¿Any suggestion?

Thanks in advance,

Oriol Ciurana
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