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Excellent demonstration, super easy to follow and very neat method to complement the "rule of thumb" method for distances. Similar right isosceles triangles for the win!

Beautiful

I learned this while I was in Boy Scouts.

Here is an easier way to measure tall trees ruclips.net/video/cDy5OjfMfZ8/видео.htmlsi=ERpSE6Qr8NsKdXmw

About 7% off…..doesn’t sound that accurate to me. I know I have seen another demo that was much simpler and just as accurate.

Very cool, thanks for sharing. Here’s another way to measure height without getting on the roof. ruclips.net/video/cDy5OjfMfZ8/видео.htmlsi=_FTs7AgWXR1UJ8zw

Very useful but are the hard hats really necessary?

About 50 years ago, I showed a similar method to some scouts whilst at camp. We used the stick at arms length similar to you. Held it so the thumb was at the base of the tree and we moved backwards until the top of the stick was at the top of the tree. The next step was to rotate our wrist through 90 degrees and our thumb was still at the base of the tree, then one of the scouts paced the distance until we told him to stop. We stopped him at the end of the stick. He then placed a marker on the ground and we calculated from his pace (all scouts knew what measurement their pace was) how tall the tree was.We did a double check with a measuring tape and the lads were pleased when that their calculations were very close to the final measuring tape distance/height.

Do you use the velocity profile in your gauging?????

Your control doesn't have a uniform flow....

Why the helmet?

That’s close but not considering your eye’s line of sight above the ground. You can be more accurate by measuring your eye-height above the ground (assuming level ground) and adjusting the base end of your stick to a measured point up the trunk equal to your eye-height. This is how we did it if our primary method of measuring was “on the fritz” or batteries died. Lol

World: cm America: inches World: km America: miles World: kg America: lb World: gm America: oz World: liter America: gallons World: petrol America: gas World: but why?

Every day is a day for learning. Thank you very much!

I just learnt something - thanks!

Hahahaha!!! Big brain college boys. Work as a timber faller for a while then you will not need to play silly mental games to impress nieve people.

I find it far easier and more accurate to fell 'em and then measure😐

measre from the point you held the yardstick, not from your hip

Frost usually doesn't harm turnips unless theres a hard freeze i plant them late September in my area for cattle to graxe along with winter rye

I plant them every year good forage for all livestock

At least these mathematicians were wearing safety helmets. Their lack of eye protection is however unforgivable!

Great tip guys

Don’t we just love a good old school British yardstick

Too much noise in background

Did you take into account the laser being held five feet off of the ground? I believe that would make it 60 ft. with the stick, 61 ft. with the laser. I've never use a laser so maybe it takes this into account. Thanks for the great presentation.

Also, don’t forget to wear a hardhat in case the tree wants to fall down on you to prevent you measuring her

I usually just cut first and ask questions later.

Isn’t this the Pythagorean Theorem, Professor?

Hi, thanks for the video. Just wondering if the difference has something to do with the length of your arm? You measured from where you were standing not where you were holding the yardstick.

I have someone take a picture of me standing next to the tree. I know how tall I am, and I can figure out how many "me" equals the height of the tree.

I think the tree height was higher than your yard stick was you didn’t measure 30” arm length using the tape measure?

Hey Bubba !!! How’d you get from 30 inches to 60 feet tall just cuz you 60 feet away? Pythagoras is dying of of laughter in his grade. So glad you’re a college professor !!! Nice teeching y’all got there.

I learned this in the Boy Scouts over 50 years ago

Never put a stick close to your eye as shown by the person in this video AND ESPECIALLY NOT while walking. If you stumble or something crashes into you, you risk impaling your brain through your eye socket with the stick.

Measure distance from tree (any distance will do). Point one arm directly perpendicular to tree, other pointing to top of tree. Estimate angle of Arm. Take Tangent of angle, multiply by distance from tree. Result is height of tree. Tangent of Angle = Tree Height (?)/Tree Distance.

I really needed this cos I live in the city so obviously I measure tree heights every day

So you measured the height from your feet to the base of the tree and got 60’. If you deducted the length of your arm 33” you would have had a height of 56’9”. I would say you were less than .5% out. Not bad. I like it.

WOW!!!

Your method is sound - if you happen to be packing a 100 foot tape measure. A simpler way would be to turn your stick 90’ horizontal and have someone pace off the distance. If you are alone, then sight the spot where the horizontal position of the tree-top, then march it off yourself if possible. This from a Boy Scout Handbook from the 1960’s. Although the Scouts have come into much disfavor over the past several years, there is a wealth of common sense information in those handbooks. Thanks for the video.

Forestry In the State of Texas? What a joke.

It's simply Thales' theorem.

I remember being taught to do this at a summer Forestry Conservation camp when I was in high school by a Penn State professor or forestry student.

if the ground is flat. Does the same technique work on severe uphill or downhill terrain ?

do not use this for top out spot when dropping- 40 years arborist and logging says otherwise I.e limb side weight, lean, species pop-off potential (I.e some species project off stump more then others) terrain Hill side really throw

said looking vertical also said looking at ground with is it lolololol which is it

Good luck measuring a tree in your small back yard and having your house in your way to step back far enough

not many people have a 100 ft tape measure. But a piece of string and the yard stick could still do it all.

Pythagoras was a cool dude..

Cool 👍

YEP- that's how we measured how high our MODEL ROCKETS went in Physics class too. and the ARMY used that for all kinds of things... I lke the triangulation method better.. :)