the level to a turning point should usually be how many feet?
2007-05-30 15:11:55 · 3 answers · asked by simba22 1 in Science & Mathematics ➔ Engineering
It will be determined by the instruments sight distance. Some allow for accurate rod readings for distances from 300 to 500 feet. The individuals sight also factors in to some extent. Some people have better vision and more experience which allow them to get accurate rod readings from a longer distance than others using the same instrument. But most instruments have suggested maximum distances.
2007-05-30 18:06:22 · answer #1 · answered by Loco Mexicano 3 · 0⤊ 0⤋
The turning point is a known elevation in a level survey. The maximum distance would be line of sight with conventional instruments. All of this is obsolete with the advent of global positioning satellites and mapping.
2007-05-30 15:27:06 · answer #2 · answered by patriot 2 · 0⤊ 0⤋
The average is probably a few hundred feet, but if you look at the triangulation of India in the Great Survey, by building towers and using long chains, they did points miles apart.
2007-05-30 15:17:32 · answer #3 · answered by Mike1942f 7 · 0⤊ 0⤋