The principle of tachometry is used -
(a) for locating contours
(b) on hydrographic surveys
(c) for filling in detail in topographic surveys
(d) All of these.
The correct Answer Is
(d) All of these
(a) for locating contours
(b) on hydrographic surveys
(c) for filling in detail in topographic surveys
(d) All of these.
The correct Answer Is
(d) All of these