[MAIPC] measuring tree height in a forest

[Ivmpartners2]

Equilateral triangles. Hold a stick horizontal to your arm and the length to your eye (right arm to right eye), then stand stick up vertical. Aim bottom of stick at your fist (where stick exits by your thumb) to approximate same height on tree trunk level to your line of sight. Keeping your head level look up to tree top and walk backwards or forwards until you line up top of stick to tree top. Then measure length from you to the tree. That distance, plus your height from feet to your eyes, is the same height as the tree.
Rick Johnstone 

Rick Johnstone 

> On Apr 18, 2016, at 6:15 PM, Muth, Norris (MUTH) <MUTH at juniata.edu> wrote:
> 
> Biltmore stick could do it. Or clinometer and tape measure/range finder plus geometry. There's at least one hypsometer app that could do it.
> 
> There are also more expensive range finders with hypsometer capabilities built right in.
> 
> Hope these help.
> 
> NZ Muth
> Associate Professor of Biology
> Juniata College
> 
> 
> 
>> On Apr 18, 2016, at 6:07 PM, Richard Gardner <rtgardner3 at yahoo.com> wrote:
>> 
>> Does anyone have a simple method for measuring tree height in a forest? I am using a golf range finder with the Pythagorean theorem, but there are problems with this including imprecise units which are overly large (meters or yards) and being able to focus the rangefinder on the top of the crown.
>> 
>>                                                                                                                                              Richard Gardner
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