What is a ground line (G.L.) or a reference line?

[azeem]

Hi I am Azeem,

What is a ground line (G.L.) or a reference line? Why they are use?

[Amar]

Hi Azeem

Ground line is the interection of the to planes verticle and horizontal, and it is denoted by X-Y line.

Thanks
Amar

[Kamlesh]

Hello,
I am Kamlesh
We often use or draw a reference line in engineering drawing to show additional dimension of particular line or point or any other geometry.

Thanks

[ravi]

Hi,
I'am Ravi
It is a reference line which is intersects two different Horizontal and vertical planes.

Thanks

[azeem]

Thank you for Answers.