Total station problems
Time
went on and in the end most instruments – both theodolites and transits were
manufactured with telescopes witch could be inverted. Now, the original
distinction is no longer suitable and the way instruments were called was a matter
of local usage. The vernier-read instruments were called transits and more precise
ones with optically read instruments were called theodolites. Earlier theodolites
used to have verniers and micrometer microscopes for reading angles, then they
were manufactured with optical systems with witch the user could read both
horizontal and vertical angles through an eyepiece located near the telescope. The
newest theodolites showed the horizontal and vertical angles digitally in a display
window. Now, actually, transits and theodolites are almost obsolete in American
surveying practice
annaabi.ee 
