Personal error in levelling occur due to

When it is not possible to set up the level, midway between the two points, then the difference in elevation between the…

Cadastral map is a map having

Pick up the odd instrument

The main principle of surveying is to work

When the first object is to be focused, the scale, is set to 0° 00'00" and then

For indirect ranging, number of ranging rods required, is

Closed contours of decreasing values towards their centre, represent

A Bench mark is a