Measuring distance using Stadia Lines

This video shows you how to measure distance using the Stadia Lines in an Automatic Level. The measurements are calculated in metres.

[@ryanpiro6419]

Land surveying for almost 10 years. Never knew what those secondary lines were until now. Thanks!

[@Buildsum]

Hi Ryan, thats interesting as we don't use them however it was one of the first things that i was shown. Thanks for your comment.

[@armorvestrus4119]

This is the only good video on teaching how to read the meter stick.

[@Buildsum]

Thanks Mate, I also cover it in these videos kzbin.info/www/bejne/aavVeYGlYr6Km7c kzbin.info/www/bejne/h3ibZIZ4bt2lqNk

[@MotoWanderer]

Very clear and useful. Thank you.

[@imjustjoe8380]

thank you Buildsum, i am about to take an intensive site setting out engineers course after many years ago doing a basic site setting out course. Your videos have been fantastic to help me refresh ready for the course and have also learnt more than i knew. Keep up this fantastic work

[@Buildsum]

Thanks Mate, good luck with the course.

[@armorvestrus4119]

This is the best example of how to read the Stadia rod that I have found on You Tube. I Wish he had a few more about this and how to setup a auto level over a point. Total station make it easy but a level takes more effort.

[@richarddrum9970]

Great lesson, thank you. Learned this the first week of a college surveying class and yes it only applies for relatively level ground, a sloping surface requires use of the vertical angle in that calculation.

[@y_p7]

Mate you're the greatest video uploader in KZbin!!

[@Buildsum]

Thanks Yusuf, I'm glad you like my videos, thanks for your kind comments.

[@black_vanillak.e6056]

Short and precise, props!

[@Buildsum]

Thanks Mate.

[@alexmcdonald378]

Awesome and concise video. Thanks!

[@Buildsum]

Thanks Mate, Glad it was helpful!

[@warhawkfan1234]

Thank you for this explanation, really helped!

[@Buildsum]

Thanks, Mate, No problem

[@Elfin4]

Very good explanation and easy to follow.

[@danuk500]

Thank you for this. Very clear and to the point!

[@Buildsum]

Thanks Mate, Glad it was helpful!

[@kirandewoo5390]

Thanks . Its clear and direct explanation. Simple

[@Buildsum]

+Kiran Dewoo Thanks Kiran

[@amandadube156]

Very succinct, thank you very much for the help!

[@Buildsum]

Thanks, Amanda, thanks for your comment, I'm glad you like it.

[@jivarasulaiman9814]

Always good spot on !!

[@Buildsum]

Thanks, Mate.

[@optroncordian7863]

At that close I usually turn the rot on the other side to read on the millimeter scale. That is moee precise.

[@Aleamae_Mokae]

Lovin ur videos, mahalo!

[@Buildsum]

+Haneoo Hamoan Thanks Haneoo

[@geobeta1351]

Very clear! thx

[@Buildsum]

Thanks George, Glad you like it

[@Patriot1066Tom]

But this is accurate only for horizontal sight. If the distance is measured on the slope, don't forget to use vertical angle as well.

[@yhan5337]

How will i solve the lower hair if the upper and the middle hair are only given in completing the table

[@Buildsum]

Hi Julie, im not sure why you would only be given that much information however the top stadia line is the same distance above the middle line as the bottom one is below so you could just double the distance from the middle line to the top stadia line.

[@yhan5337]

@@Buildsum its kinda look like a teeth 😅. Thats why its hard for me to get the lower hair or the upper hair. Because i dunno how will i get the interval of it if there's any missing hair in three wire leveling, in every station.

[@DudeSociety]

Hi Buildsum, why do you have to multiply it by 100?

[@Buildsum]

Hi Mate The stadia marks are set a specific distance apart. The distance is chosen so that there is a fixed, integer ratio between the distance observed between the marks and the distance from the telescope to the measuring device observed. This is known as the stadia constant or stadia interval factor. In most caes that stadia constant is 100mm

[@antoineboudreau2983]

Thanks - very neat, they didn't go through this in school (or I wasn't listening I'm assuming) In terms of precision, what is acceptable (given the Surveyor and Rodman are experienced). Using this example, I found 1mm translates to a 100mm bust - in a linear function. Could you reduce the error by taking 3 reading (getting the rodman to measure out precisely 1m in and out from your TPn). Also it may be important to point out that this won't measure the distance between a and b but only delta H of a and be right?

[@Buildsum]

Antoine, I generally don't use this function if I need extremely accurate distances. I would not use it to set out for instance however for measuring distances for excavation calculations it would be fine. Obviously, the more checks you make the better of you would be however there are plenty of different methods that would be quicker and more efficient. Yes, this will only give you the horizontal measurements.

[@antoineboudreau2983]

​@@Buildsum - exactly, just an extra tool in the toolbox. Thanks

[@jemaka9541]

please could do a video on how using a theodolite can help calculate linear misclosure, locations angular misclosure, forward bearings cause my teacher so confusing

[@Buildsum]

Hi Honna Sorry, but I don't think I know enough about those things to do a video on them.

[@thecapedcrusader128]

Yea but how did u determine those digits after a comma

[@Buildsum]

Hi Mate This might help kzbin.info/www/bejne/Zqe6aoWXftRol6c

[@jamesodonohue448]

Great for restraining order distance but still watching them

[@Buildsum]

Thanks James

[@armorvestrus4119]

They should include a good example like this with every Transit level so a new user will have some guide lines to start with.

[@Buildsum]

Hi Mate, yeah that would be a good idea, maybe they could just put a QR code link to this video ;). Thanks for your comment.

[@foerdie]

Hi how do we count if the thing is close using spotter like the object size through the spotter is 2.2 how to we measure the distances?

[@_emotionalwaves]

if we had to use middle hair stadia reading, is it possible to calculate horizontal distance??

[@Buildsum]

Hi Aatis No you need the two readings to be able to work out the distance

[@_emotionalwaves]

thanks

[@superklassen87]

mind blown

[@imskouter]

What is 100 that is multiply?

[@Buildsum]

Hi Mate, the stadia lines are set at a known angle and as we know what the separation of that angle is for every distance then by measuring the amount of separation at a point we can calculate the distance to that point. The 100 is the factor that you need to apply to convert the separation measurement to the distance measurement. Hope this helps.

[@imskouter]

@@Buildsum thanks Mate for this helpful video and answer.

[@ezekielaweojo4703]

Woah

[@waheedazam5318]

verry good

[@Buildsum]

Thanks Mate glad you like it

[@obakeng.sranthibane3787]

very good sir

[@mebanshankharbuki2379]

0.128mm = 0.128 * 100??????????

[@Buildsum]

Hi Mebanshan, what is your question? If you times the 128mm that you get from the readings on the staff and times it by a factor of 100 you will get the distance from the centre of the instrument to the face of the staff, in this case, 12.8m

[@panagiotisasvos6623]

Its not the right distance measure. The correct is D=g*sinsqr2(z)*100=12.8*sinsqr2z*100 where z is verdical angle of instrument.

[@Buildsum]

Hi Mate, thanks for your comment. My video is for an Automatic Level only as your formula is making an allowance for vertical angle I assue that it is for Theodolites and the like.

[@panagiotisasvos6623]

@@Buildsum Ok you are right i misunderstood. Hies From Greece.

[@priyankabarik429]

How 1.064come

[@Buildsum]

In this example, I am using the top and bottom Stadia lines to establish the distance from the instrument to the staff. They are read the same way as the centre cross hairs. kzbin.info/www/bejne/Zqe6aoWXftRol6c and then the difference in the two readings multiplied by 100 to give you the horizontal distance.

[@misahasite]

Hello friends, I hope we are friends

[@ezekielbukulu8143]

0.999

[@amaniboudan6474]

Who's here from Baldy

[@mebanshankharbuki2379]

0.128mm = 0.128 * 100??????????