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

[@KelvinAcademyYouTube]

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.

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Truly a life saver, can't wait to hack those exams. I just subscribed too. Much love from Kenya.

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30 mins video just summarised my whole semester.

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Same here

[@Dane-o4t]

Summarize my full years in school

[@MercyCassie-n3o]

That’s right

[@timatata]

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

[@mistajay9017]

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.

[@ochiengquinter6048]

Thanks for the video from Kenya 🇰🇪

[@agneswambui6455]

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

[@cmscliff]

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 👏👏

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[@Mz-laughter]

I wish I saw this earlier before my semester, very understandable

[@nuwaherezaemmanuel1185]

Very good explanation, u just summarised the entire academic year in 30min

[@maireboy]

Thanks for this video. I went in circles trying to understand this concept, and you did such a good job of breaking down in this video.

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God bless you 🙏
A very good tutor🎉

[@nnlm7719]

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

[@MichaelNeatis-i7m]

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

[@yonasgebeyehu9880]

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

[@Panther-]

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

[@pulikasapha2459]

This is the best tutorial on RUclips 🥳 well explained

[@TheRealAtomeec55.]

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

[@JolaKay]

This was very well detailed! Well done!!

[@kerenkanzemwarabu]

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

[@FARAHACEN]

Hey you are saving my semester sir.thank you

[@tulipohambawerniza4245]

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

[@ianoloya8421]

I am just ready for my papers now. thanks!

[@saiduakonneh889]

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.

[@IsaacOngaro]

Good for me as a young surveyor of tomorrow
May God bless you inmost

[@jasonluis5114]

Amazing video saved my exam

[@meticangu9106]

Very explicite and elaborative thank u sir

[@dooshimaaguh6816]

This video proudly gave me an "A" for d second time. 😅😅 Tank u Kelvin

[@kingolympio8688]

You really took your time to explain the concept

[@pentarlearsi1446]

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

[@aarhin919]

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

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best tutorial ever.thank you

[@richards_greatman]

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My exams is for today and you really made me ready.

[@collinsenoma3670]

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

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I respect this man thank you so much

[@thatego.moreti]

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

[@CorneliusMadikizela-em5ih]

Thankyou Sir Watching from South Africa.

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Thanks sir. Well and detailed explained

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

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this video is just superb!

[@tabben-s6e]

Thankyou so much sir,, watching from Kenya

[@MarshaVanwyk]

Best🎉❤ lecturer ever❤

[@shylinemutasa2454]

Yu rlly took your time to explain ..thnks brother

[@DominoCreek]

Thank you Kelvin

[@okoroafordave9329]

made it look so easy, grateful sir🙏

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Tq from Malaysia🇲🇾🇲🇾

[@NalwaddaRose-rg5fl]

Thanks so much very productive in terms of learning

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i have attended 3 lessons in class and i still came out of nothing ,,,,,,now iam perfect ,,thanks

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[@justfaith495]

thought this was rocket science until now. thank you

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I love your teaching

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Well explained. Thanks watching from my home country vanuatu

[@charlesmadison4391]

Wonderful. Thank you sir

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This is great work Sir

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Very good procedure.

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You are perfect sir

[@TinasheTimer]

Yes sir u explained much better

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Thank you sir. Very helpful

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Perfect work

[@asayilethindwa3209]

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[@ClintonCarlito]

Accurate presentation

[@ZackySullu]

very good explanation thanks much

[@armstrongdoeansu5249]

excellent explanation. please add the adjustment and misclosure

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Definitely giving it a like

[@joelobeng5471]

You helped me 🙏🏿🙏🏿🙏🏿🙏🏿🙏🏿

[@topeokuntade9189]

Please do a video on the use of theodolite

[@KelvinAcademyYouTube]

Absolutely.

[@mercynkya3731]

This help me alot
Thank You🙏🙏

[@mathiasmwausegha7759]

This is awesome

[@suzzetserede]

Thank you so much sir ✌️✌️

[@biliameensuleiman9006]

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

[@KelvinAcademyYouTube]

I will explain in another video.

[@mcebotsabedze9848]

what a nice lesson

[@kofipeter6471]

Very very good continue boss

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Please come and be a lecture to my school👌

[@mujuniwycliff8501]

Thanks so much 🙏 💓 brother

[@BlessTankeh]

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

[@KelvinAcademyYouTube]

Talk to a practicing surveyor in the area, or visit the engineering survey office of your local council. If there are no national established control points, then there will be Temporal Benchmarks or some sort of recognized secondary or tertiary control networks.

[@NtlakuBaloyi]

Thanks Kelvin❤

[@napomokhethi7818]

Thank u, even my foreman couldn't explain

[@BelindaNsiah]

Wow you are special ❤

[@ochiengquinter6048]

Curve ranging in the field plus calculation please 🙏

[@Emmanuel-u8e]

God richly bless you

[@ericklele]

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

[@KelvinAcademyYouTube]

Already established by a surveyor, or ask your local council surveyors. If there are no established OBM, then the surveyors in the area have to work it out from measurements and calculations.

[@Goldenvilla07]

Thank you sir

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Thank you sir 🙏

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Nice 👍 video

[@ElyseMugisha-uy7et]

Thanks teacher

[@karabosekele6732]

Thank you