Two Peg Test

[@Panther-]

Got it.Thank you.The key is reading the 2nd test closer to point A then reading Point B further away and if theres an error the further distance should show this.

[@johanneszondi8356]

Thanks a lot for helping me mastering the two way test.
Took me 5 minutes to know how to do it.
Thanks once again.
Regards
Johannes.

[@FinchleyCollege]

It is a really easy task, books make them look difficult.

[@rayrenzi4860]

One of the better explanation's I've seen

[@stefftravel]

Very well explained

[@guohaoling5046]

thanks you helps me a lots on surveying studying

[@Jaydon-dw4dt]

I just wanted to know if the two peg test is the same as a resection?
Thanks for the videos, found them very usefull

[@FinchleyCollege]

Hi Kola,
No two peg test is for checking dumpy level for accuracy, resection is for finding total station coordinates
Regards,
Reza

[@khalidhashemi4920]

Do you keep the staff at the same place?

[@FinchleyCollege]

You should hold the staff on both points, either use two staff's at the same time, or hold one on the first point, then move it to the next point.

[@alexandredoprado9241]

What is the acceptable error? Is there some official standard that define the acceptable error?

[@FinchleyCollege]

Hi Alexandre,
The acceptable error is usually about +/- 3mm in every 60 meters, so, your two peg test needs to be at about 60 meters. It also depends on the task in hand, If you are just level surveying a field at every 5 meter grid, then error can be more because ground there is a high variation in exiting levels. On the other hand, if you are surveying a flat ground or concrete slab with an allowable tolerance of +/- 5 mm, then your instrument needs to be a lot more accurate than standard 3 mm.