Video: Tangent Method on Flat Ground

Video demonstrations of various tree measurement methods.

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#1)  Video: Tangent Method on Flat Ground

Postby Matt Markworth » Thu Jul 28, 2016 10:55 pm

NTS,

Here's the first in a series of videos I'm creating that will demonstrate various tree measurement methods. The particular tree model used in this first video will be useful for height and spread measurement methods, and I plan on making more models as well to illustrate various situations that are encountered in the field. My hope is that these will serve as a valuable training aid when we are teaching others how to accurately measure trees.

The videos will be centrally located on this channel: https://www.youtube.com/channel/UCt5AzZfhj78Pg8tvxrfUVyg


https://www.youtube.com/watch?v=y-u6088XS3w

Matt

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DAKennedy, Don, Larry Tucei
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#2)  Re: Video: Tangent Method on Flat Ground

Postby Larry Tucei » Fri Jul 29, 2016 4:26 pm

Matt-  Good job on illustrating measuring a tree using the Tangent Method looking forward  version  using the Sin Method. Larry
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#3)  Re: Video: Tangent Method on Flat Ground

Postby dbhguru » Sat Jul 30, 2016 6:29 am

Matt,

   Echo what Larry said. This is another excellent tool for illustrating the method. Many people will connect better with this approach. I look forward to the series you are creating.

Bob
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#4)  Re: Video: Tangent Method on Flat Ground

Postby Matt Markworth » Sat Jul 30, 2016 9:32 am

Larry, Bob,

Thanks! If I can put together a big enough library of topics then I'll also burn a few dvd's to give to interested folks at events, etc. I think my next topic will be the tangent method on sloping ground.

Matt
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#5)  Re: Video: Tangent Method on Flat Ground

Postby Bart Bouricius » Sun Jul 31, 2016 8:11 am

This is good, but as you are aware, it will not be accurate without verifying that your ground level triangle leg extends exactly to the spot directly below the top of the tree, and eye balling this is notoriously inaccurate.  Perhaps using the plumb bob in the video affixed to the top of the tree?  What the hell, if you are up there anyway just do a tape drop.  In reality, I guess we have to address the problems with the tangent method one step at a time, and this is really a great first step in that thinking process.
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#6)  Re: Video: Tangent Method on Flat Ground

Postby dbhguru » Sun Jul 31, 2016 11:38 am

Bart,

  Matt's new videos, the AF Tree-Measuring Guidelines, the NTS guidelines, Cadre training materials, etc. collectively will increasingly  make an impact. There was a time when I didn't see results, but that is changing, and I think the rate of change is going to speed up.

  What are you doing these days?

Bob
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#7)  Re: Video: Tangent Method on Flat Ground

Postby Matt Markworth » Sun Jul 31, 2016 8:12 pm

Thanks Bart! Also, thanks very much for your suggestion and I have added an info bubble/link during that part of the video that reads, "Use Cross-triangulation to find this point on the ground. Click this link to start video on Cross-triangulation." The info bubble/link runs from the 16 second mark to the 26 second mark and if clicked it will pause the video and open the Cross-triangulation video in a new window.

Matt
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