2006-10-24 23:28:23 · 12 answers · asked by peach blossom 1 in Science & Mathematics ➔ Botany
Yes. Get someone who is exactly (or very near) 5 feet tall, or 6 feet tall and have them stand up straight with one of their sides touching the tree. Stand back from them so the entire tree is in your line of sight. Hold up a ruler or card (or even your thumb) in front of your face, and line up with the bottom of the tree, then move it up in increments of 5 or 6 feet (depending the height of your friend). You have to find a visual mark to "ladder up" from visually from each time. If you do it right, this should give you a fairly accurate measurement + or - 1 foot or so.
In other words, you're seeing how many "friends" tall the tree is. If it is 4.5 friends tall, then it would be 27 feet (if you use a 6 foot friend). Of course you don't have to have friends exactly 5 or 6 feet, it just makes the math easier.
Another method: stand back from the tree and line up a pencil in your line of sight, from the top of the tree (tip of pencil), and mark the "bottom" of the tree with the pencil by holding your thumb on that spot of the pencil. Keep your thumb still (looks as if it's on the base of the tree in your line of sight), and rotate pencil as if the tree has fallen over. Have your friend fasten a measuring tape to the trunk, then walk to the end of your pencil "sight" where you tell them to stop when then get to the end of your pencil tip. It's easier than it sounds... really!
2006-10-24 23:38:17 · answer #1 · answered by Anonymous · 0⤊ 0⤋
You can use a tripod with a surveyors scope. Measure the distance from the base of the tree to the center of the instrument. Next, place the scope and sight the very top of the tree (record the angle of the scope). Using these two dimensions, it is possible to calculate the height of the tree. Example:
The scope is placed 200 feet from the base (centerline) of the tree. The recorded angle is 30 degrees. By using the formula :
Distance from tree X cos Angle = Height of tree
200' X cos 30 degrees = 30.85 feet
You can do all of this without destroying the tree. Eat you heart out Democrats!!
2006-10-25 08:47:05 · answer #2 · answered by Doug R 5 · 0⤊ 0⤋
Support a board or 2" x 4" x several feet long at a 45 degree angle resting on flat ground (hint, it is a diagonal of a square). Move the board pointing at the tree away from the tree until you can sight along the board to the top of the tree. The height of the tree will be the same as the distance from the base of the board to the tree.
2006-10-25 01:00:34 · answer #3 · answered by Kes 7 · 0⤊ 0⤋
it is very easy . go near a tree in a sunny day . and mark the Shadow of the tree . then measure the distance between the tree and the Shadow . then yourself stand and measure the distance between you and your Shadow . then make an easy equation . tree height X your height
tree Shadow your Shadow
and the answer is what you want ! good luck !
2006-10-24 23:42:51 · answer #4 · answered by arash 3 · 0⤊ 0⤋
In forestry, we had a sighting device. You would measure a certain distance from the tree and then look through this device to the top of the tree and read the scale.
2006-10-25 07:05:39 · answer #5 · answered by dd 4 · 0⤊ 0⤋
the machine is called a relascope, it can measure how many 8 foot lengths are in the tree up to a 4 inch diameter.
2006-10-25 12:57:16 · answer #6 · answered by bob w 1 · 0⤊ 0⤋
simply u need to measure the shadow of the tree in (meter) and consider it (x), and use a ruler of 30 cm hieght by but it vertically and measure its shadow (in meter) and consider it (y) , then the hieght of tree = (x/y)0.3 meter.
note :
when u use another ruler , such as 60 cm u must replace 0.3 by 0.6
2006-10-24 23:45:48 · answer #7 · answered by manofnight12 2 · 0⤊ 0⤋
use a rope to throw onto the top of the tree and measure it with the rope..
2006-10-24 23:36:28 · answer #8 · answered by samdesign78 6 · 0⤊ 0⤋
use a measuring tape
2006-10-24 23:43:47 · answer #9 · answered by genius sonia 3 · 0⤊ 0⤋
climb it with measuring device
2006-10-28 18:29:06 · answer #10 · answered by Anonymous · 0⤊ 0⤋