29, 2006 18:41 PST
Finding the top of the tree while scanning with the rangefinder
of the art forms of tree measuring. I am still working on it.
Bob, Dale, and others can whip out a tall measurement and be
I am still looking.
If you hold the button down right the rangefinder will go into
mode. Move it back and forth across the area you think may have
highest top. In a series of branches at about the same angle
the one that is the farthest away by the readings is the tallest
group. Look for tops back into the tree farther when viewing
side rather than just looking at the branches closest toward
though they may appear to be higher.
You also need to be sure you are actually reading reflections
branch you are looking at rather than an intervening branch.
back and forth helps you decide if you really are hitting the
are pointing at. Look for wider openings to get a better shot
from any intervening branches.
Walk around the tree and look for shots from different angles.
different high points. All are not visible from the same
have been encouraging Bob L. to try and write a list of
how to best explore the crown of a tree, but so far no luck.
Anyway, perhaps you found the highest point after all.
Back to Don
30, 2006 05:03 PST
The ability to use a continuous scanning mode with these
lasers really helps to find the highest of the high points. As I
when we visited that big cherrybark oak, I spent quite a bit of
scanning heights in the 80s or 90s, before I finally hit some
branches that made 100+ feet. It sometimes takes a lot of
these large crowned trees, but rest assured that with the sine
unless you are measuring the wrong tree, your estimates will
too high. I have just come from a forest with a tuliptree
claimed to be
180+ feet tall that is actually about 135 feet...
|Will Blozan write in Tree Measuring Guidelines
for the Eastern Native Tree Society:
· How do I explore the crown architecture?
“Skate” the laser over the surface of the
crown and in “nested” pockets and places you may not expect
a high part to be. The highest point may be well below what
appears to be the tallest part. Look for the farthest distance
first, then the highest angles with far readings. Once you
become familiar with a species and its architecture, you will
know how to narrow your search down.