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topografia 1 forma della terra

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B<br />

A<br />

α<br />

d r<br />

d o = d r x cos α B 0<br />

Q a<br />

FORMA DELLA TERRA<br />

Riduzione delle distanze<br />

A’<br />

d t<br />

B 1<br />

campo topografico<br />

R<br />

0

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