VD is stand for vertical distance in engineering .we can say vd vertical distance definition the differentiae between two point of the earth . we can find v.d vertical distance from many instrument . In old generation tape or bubble pile is specially using for finding vertical distance vd . in this modern generation a lot of instrument is invented for find vd vertical distance . I m teaching you to find out vertical distance vd on level machine in next tutorial I will teach you finding vertical distance vd on Total Station .
How to measure vertical distance with Dumpy level
The differecenate between two point is called vertical distance (V.D).
How can you find V.D on level machine ?
First of all open tripod and expand it on ground and then fix level on tripod plate with the help on plumbing fork
Now set the bubble with help of leveling screw. when bubble come to the center then leave leveling screw your instrument is ready for work
If you are using machine first time .You must check machine fault.
First of all you must be B.M in your Survey site
keep staff rod on B.M and target it and take reading on cross hair with help of eye piece .That will your B.S reading.
Note the data on level book or in your copy.
keep the Staff rod on every R.D and target it and take reading on cross hair with help of eye piece.
Also note it in level book or in your copy.
Calculation for finding VD
you can do calculation in the site but if you want to calculate the data on computer. I will also teach for you
But first manual Calculation
First make H.I . H.I is very necessary for find V.D
Formula for making H.I
And then make subtract all I.S from H.I
Formula for V.D
H.I – I.S =V.D
Thank you for reading What’s VD Vertical Distance and Finding Procedure this tutorial i will share another related article finding vd vertical distance on total station. if you have front any problem then contact us or do comment in comment section.