Bob-
I am not surprised that in the quest for tree superlatives that Larry's live
oaks has you thinking they may be a contender for the humongous crown category.
Higher order crown measurements might be in order. Some thoughts:
You may recall me plugging the GRS densiometer
GRS Densiometer
This instrument has an angled sighting
mirror and offset leveling vials which allow vertical
sampling
of forest canopies for a variety of coverage
characteristics
such as: canopy structure, coverage by tree size and
species,
and percentage of conifer/hardwood. Constructed of durable
PVC material.
in earlier posts, maybe not. But as one who used it often to determine canopy
closure, I think it would be ideal, accurate, lightweight, and small enough for
every man's gear bag. I envision a tree nerd with a GRS in one hand shooting
the edge of a crown, a GPS in the other as he/she traverses around the edge of
the crown.
Another consideration, would require a 3-D visualization software, but consider
the same tree nerd roaming around the live oak, shooting an array of vertical
triangles that 'map' the crown (instead of seeking only high point, seek crown
representative points, that would better build the crown model.
-Don
Date: Fri, 6 Mar 2009 01:58:11 +0000
From: [email protected]
To: [email protected]
Subject: [ENTS] Re: Problem#15
Larry,
I believe that those huge southern live oaks that you are documenting
signal the need for us to expand our set of measurements - principally for the
biggest of the trees that we document. Our challenge is to choose a set of
measurements that can be done in the field and that convey the size of the
tree. What do you think of the area of the crown projected onto the ground? I
have an idea of how best to collect the field data and run the numbers through
a spreadsheet to get the area covered, but don't want to pursue development of
the process if the rest of you don't see merit to the idea. I'm anxious to also
hear from Ed, Will, Dale, Don, Don, et al. on the idea.
Bob
----- Original Message -----
From: "Larry" <[email protected]>
To: "ENTSTrees" <[email protected]>
Sent: Thursday, March 5, 2009 4:41:48 PM GMT -05:00 US/Canada Eastern
Subject: [ENTS] Re: Problem#15
Bob, Thanks for the formula. This is some good stuff Bob! Larry
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