hello
i have some questions about deformation of high builds ,bridges,dams,by GPS ,(X,Y,Z) . do coordinate z by gps have good accuracy with +/- N or need to leveling
N=H(e)-h(n)
hn= height mean sea level
He=height ellipsoid
please if possible show me refrence
best regards
hello
i hope to have a nice day
i would like to more know about of effects of current air on changes azimuth in tunnel.please if may be show me reference books and category errors in tunnel
best regards
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Full Name (first, last)
Michael Sanchez
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Hemet
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