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k0ua
Epic Contributor
Doh (headslap) ! Why didn't I think of that?:mischievous:
Getting rope or string over a tree.
- Thread starter k0ua
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Doh (headslap) ! Why didn't I think of that?:mischievous:
4570Man
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My quadcopter is a fairly old and doesn't have GPS elevation. I used it to lift up a string to the top of the tree and marked the string at the ground. Then I landed it and measured it. I could have done it with math but this was more fun. I could also measure the distance across a river with math, but the quadcopter is more fun.
MossRoad
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Yes it is.
dfkrug
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I estimated the height of several redwood trees, back when I was fighting the County to keep from being forced to
cut them down. I used trigonometry, but my ground is sloped and I could not get far enough from the base to
get good measurements.
I would not only measure height with the string like you did (or GPS if it worked), but also use the string to
drape over a high branch, then use it to pull up a rope. Then the rope could be used to pull down "widow-makers"
or to help fell a tree in the right direction.
You don't hardly need math at all.
Use cardboard, etc. to make a 45 degree angle. Mark the tree at eye level. Back off until the bottom of the angle points at the mark at the same the 45 angle points to the tree top.
The distance to the tree plus your eye height is the tree height.
Bruce
Use cardboard, etc. to make a 45 degree angle. Mark the tree at eye level. Back off until the bottom of the angle points at the mark at the same the 45 angle points to the tree top.
The distance to the tree plus your eye height is the tree height.
Bruce
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k0ua
Epic Contributor
Well now that is the easy way. providing you have more or less level ground .
MossRoad
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I just stand next to the tree and put my hand against the tree at the top of my head, turn around and note the spot. I'm 6' tall, so that mark is 6' (close enough). I get far enough away from the tree to where with my outstretched arm, I can put my thumb up :thumbsup: and the top of my fist is at the base and the tip of my thumb is the 6' mark. Then I just work my way up the tree using my thumb as a 6' scale. Five thumb lengths it a 30' tree. Ten is 60'. If the tree is tall, I'll figure two thumb lengths for a 12' scale and back away far enough to see the tree. Nine thumbs is 108'. Works close enough for guestimation.
scdeerslayer
Gold Member
That's similar to a way I learned I think in the boy scouts. Have someone stand next to tree, stand a good distance away, and using a pen or stick put the top of the person's head at the end of pen, and your thumb at the ground, and count that distance up the tree, then multiply by the person's height. It was for estimating the distance needed for a tree to fall when cut down.
MossRoad
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I learned from my mom and dad, both artists. Dad was an architect by trade. Mom taught art, but had a degree in biology.
Jim Shooz
Veteran Member
I only had a 3' tape measure and no protractor so I took a square sheet of paper, folded it diagonally, moved back across the paddock until the 45° slope reached the top of the tree. Went onto Google Earth > Tools>Ruler and measured from the tree to where I had been standing. It was big tree.
