How to Calculate Height of Collimation (HOC) & Rise and Fall Methods for Site Engineering Surveying 

Video Timeline Guide: 00:00 Introduction. 00:31 Surveying field book table for recording. 00:38 Table difference between HOC and Rise and Fall. 00:53 The instrument needed for the levelling (Auto Level). 01:02 The difference between Auto level and dumpy level. 01:10 Auto level, surveying tripod stand, survey levelling staff or rod. 01:30 Plumb bob in surveying (what it's used for). 01:55 What is surveying benchmark (How to identify site benchmark). 02:44 GPS and GIS with site benchmark. 03:23 How to record surveying field data. 03:27 How to record the benchmark values on table. 03:43 What is Backsight in surveying and how to record backsight. 04:31 What is Intersight (intermediate sight) in surveying and how to record intersight. 05:30 What is a foresight and how to record foresight. 09:42 How to read the cross hair in surveying. 10:38 Staff or rod movements and points to measure. 10:53 Manhole, marked points on site, curbs, gutters, permanent site structures, etc. 11:59 Foundation setting out with theodolite, total station or measuring tape. 12:11 Difference between a total station and a theodolite. 12:20 Purpose of levelling in surveying. 12:50 How to calculate levels using height of collimation. 19:33 How to check for Height of Collimation with formulas. 19:43 Sum of backsight and foresight. 20:15 Last reduced level minus first reduced level. 22:51 How to calculate levels using Rise and Fall methods. 31:13 Formulas for checking the accuracy of rise and fall in surveying. 34:31 Conclusion of Height of Collimation and Rise and Fall surveying.

30 mins video just summarised my whole semester.

This video was made for people like me with no background. Sir i really do appreciate mostly on how to read the staff and filling the table. May God continue to lift you up

Thanks for the video from Kenya 🇰🇪

Something I couldn't understand for years , just became simple in minutes..... Thank you

I think you should register your institution sir where it will take us 2 months to get our qualifications.....best tutor ever🎉

Watching from Kenya....the best tutor ever....

Hi Kelvin. This video "saved my life". I last did this at university almost 20 years ago and I am teaching this course to Architecture Technology students this year. You can imagine! Thank you very much. Your illustrations are clear and straight forward.

Watching from Zambia is video just made me understand the explanation that a so call land surveyor lecture here explained for 2hrs and yet no one understood 😅. Thank you 👏👏

The best Tutorial I ever found..Frr🎉🔥🙌😊 Thanks Bro.

Really useful, informative and well delivered. I was searching for a video on this subject and Kelvin covered it all excellently. Thanks.

This is really the nice class which I ever get in surveying, Thanks man! In the future, I expect a lot!

best tutor . God bless you. your lecturing help me. i wish am close to you. by the way please load more videos on surveying for me especially basic level. because am beginner

Wow thank you brother...this was the best explanation I saw so far.I feel its a concept which requires a thorough explanation.And even nearly all videos I saw did not explain what these headers like Fs Hoc and Rl mean in detail thanks

How I understood this I even don't know .. God bless you so much sir

You really took your time to explain the concept

May God bless you abundantly !!! this video is simple to understand and it's a dime

Thank you Kelvin

Very explicite and elaborative thank u sir

I respect this man thank you so much

Very best lecture... God bless you, impressive ❤

This site is very amazing and is helping cleared most of us doubt with respect to site surveying and congratulation for this knowledge shearing program. Regarding the first step for the last level calculation, please note that the reduce level is 86.846 instead of 88.846.

Very helpful and educative too.. God bless and much love from Namibia

best tutorial ever.thank you

This is a great video. Very very easy to follow

Thank You Sir This was a very helpful lecture God Bless You

Tq from Malaysia🇲🇾🇲🇾

Thank you so much for this value sir. My exams is for today and you really made me ready.

this video is just superb!

Thanks you saved me my brother, am a teacher!😊

That is a very nice explanation, Sir. Very Informative🔥

Thanks Thanks Sir what a excellent program, that's clear my concept absolutely again thanks.

This was very well detailed! Well done!!

Thankyou Sir Watching from South Africa.

Yu rlly took your time to explain ..thnks brother

made it look so easy, grateful sir🙏

Thank you sir, ❤

very good explanation thanks much

Thankyou so much sir,, watching from Kenya

Wonderful. Thank you sir

Perfect work

Thank you brother , this is very helpful 🙏🏽🙏🏽🙏🏽🙏🏽🙏🏽🙏🏽

excellent explanation. please add the adjustment and misclosure

Thanks teacher

so much knowledge packed in this video

You helped me 🙏🏿🙏🏿🙏🏿🙏🏿🙏🏿

thought this was rocket science until now. thank you

Thank you sir

This was very helpful Definitely giving it a like

It was very helpful ❤

Thank You

I love your teaching

Sooo great a lecture

You are doing great keep up

Thank you

Well explained. Thanks watching from my home country vanuatu

Thank you so much sir ✌️✌️

Yes sir u explained much better

Please do a video on the use of theodolite

Thank u, even my foreman couldn't explain

Thank you sir Got d gist behind it But my problem is how can we apply this onsite sir

Thank you sir. Very helpful

This is great work Sir

Thanks so much 🙏 💓 brother

God richly bless you

Wow you are special ❤

thanks

Curve ranging in the field plus calculation please 🙏

Please come and be a lecture to my school👌

This help me alot Thank You🙏🙏

Thank u very much sir

what a nice lesson

ty from sudan

Very Gud thanks

Very very good continue boss

You are my favorite man 🎉❤

Well explained thank you sir 🙏 👏

Thanks Kelvin❤

Thank you sir 🙏

I want this lecture

Explanation is ok

You are good😊

Good morning. Please what if you are on a site where there's no building in the surrounding to locate the benchmark

Good sìr

Thanks 🙏

Please do a video on open traverse calculations😢

You just gave me an A in surveying

Bless

gold

It has been a year but am seeing the video for first time, are you still doing or stopped

please to have complete videos for beginners' i mean level 100 students cause i dont understand what what lecture is teaching so if you have please leave link behind

mazee barikiwa

What is the difference while using Dumpy level?

Nice

💪

Plz Plz TOTAL STATION ALSO START FOR OUR TEACHING, I NEED IT URGENTLY.

whole semester work in 30 mins

Very good I want to know why do you get that obm number

How do you get 86.452 from subtracting 0.394 from 88.846?

❤