LiDAR search reveals hidden gems

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M.W.Taylor
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LiDAR search reveals hidden gems

Post by M.W.Taylor » Fri Dec 22, 2017 5:50 pm

After searching more LiDAR online I found an area of tall redwoods along the Eel River that was overlooked until recently. I went there yesterday with John Montague to investigate. We found and measured one of these redwoods at 353.4 (11' dbh)' using a tripod mounted Trupulse200X and prism pole survey. Another tall redwood we measured later was 352' using a hand held laser survey. Also across the river from the 352' redwood were two more 350' candidates that are not on any tall tree list. Due to lack of daylight we did not have time to survey to their bases. Will return later to measure the 352' handheld measured tree and the two other 350'+ candidates with prism pole/tripod surveys. The LiDAR indicated these trees were around 350' and at least two of them are over that mark.

Michael Taylor
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~352' redwood along Eel River. Dbh appears to be about 11'. Will tape wrap next time it next time it is measured.
~352' redwood along Eel River. Dbh appears to be about 11'. Will tape wrap next time it next time it is measured.
rasterized LiDAR shows one top near 350' in 2014. It has since grown and the ground level was under-estimated by the LiDAR which is typical in flat areas.
rasterized LiDAR shows one top near 350' in 2014. It has since grown and the ground level was under-estimated by the LiDAR which is typical in flat areas.
John Montague underneath  the "Solstice Tree". Height is 353.4' and dbh 11.0'. This one is straight as an arrow with a nice pointy top. Growing fast probably.
John Montague underneath the "Solstice Tree". Height is 353.4' and dbh 11.0'. This one is straight as an arrow with a nice pointy top. Growing fast probably.
353.4' "Solstice Tree" has a close neighbor.
353.4' "Solstice Tree" has a close neighbor.

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mdvaden
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Re: LiDAR search reveals hidden gems

Post by mdvaden » Fri Dec 22, 2017 7:30 pm

Thanks for the update Michael. Glad your enthusiasm is holding up, as well as your physical endurance. I'm not worn out yet, but I'm enjoying "coasting" for a year or two here to give my joints a break. Such a great forest. Hoping to get back in there the end of this month or the next time after.

On another note, the Trupulse 200 that I got on perpetual loan from S.S. seemed out of kilter recently. I was using it in Prairie Creek and it seemed to be doing it's job for height until angled upward to something maybe 150 ft. or higher. So I couldn't get a reading on tops over 300 ft. even though there wasn't fog or rain in the air. Even near home, after changing batteries, it's hit and miss whether it will read HD over 200 ft. and if I angle it or don't angle it, the unit won't record anything of any height unless it's like 30 feet away from me.

Is a unit this old, like 8 yrs. old or more, worth sending to repair. Or is it something you could use for parts? Etc..

I still have my Impulse 200 LR and it works perfectly.
M. D. Vaden of Oregon = http://www.mdvaden.com

200 Pages - Coast Redwoods - http://www.mdvaden.com/grove_of_titans.shtml

Portraits & Weddings - http://www.vadenphotography.com

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M.W.Taylor
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Re: LiDAR search reveals hidden gems

Post by M.W.Taylor » Fri Dec 22, 2017 10:04 pm

Mario, make sure the unit is not in filter mode. You will see an "F" in the viewfinder if it is.

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mdvaden
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Re: LiDAR search reveals hidden gems

Post by mdvaden » Sat Dec 23, 2017 2:24 am

M.W.Taylor wrote:Mario, make sure the unit is not in filter mode. You will see an "F" in the viewfinder if it is.
Okay ... There is a Big "F" to the left of the reading that I didn't recall. So apparently it is in Filter mode somehow. I loaned it to the guy Chad for a few weeks. He's careful with stuff so I doubt he dropped it. So maybe he accidentally got it into Filter mode, because I never changed that.

I have no instruction manual. I could mess around with it, but if the change is easy to explain, feel free to share here.

Thanks !!
M. D. Vaden of Oregon = http://www.mdvaden.com

200 Pages - Coast Redwoods - http://www.mdvaden.com/grove_of_titans.shtml

Portraits & Weddings - http://www.vadenphotography.com

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M.W.Taylor
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Re: LiDAR search reveals hidden gems

Post by M.W.Taylor » Sat Dec 23, 2017 4:13 am

Mario, If I recall correctly, press the up arrow for about 4 seconds. Then you will see the measurement mode selections.. press the up or down arrows to scroll through the different modes. When you get to Cont or Standard press the fire button on top. This will put you back into the correct mode. Standar or continuous measurements, whichever you prefer. I like continuous because you can keep scanning tops. Let me know if this works. Michael

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mdvaden
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Re: LiDAR search reveals hidden gems

Post by mdvaden » Sat Dec 23, 2017 10:56 am

M.W.Taylor wrote:Mario, If I recall correctly, press the up arrow for about 4 seconds. Then you will see the measurement mode selections.. press the up or down arrows to scroll through the different modes. When you get to Cont or Standard press the fire button on top. This will put you back into the correct mode. Standar or continuous measurements, whichever you prefer. I like continuous because you can keep scanning tops. Let me know if this works. Michael
Thank you. The buttons navigated pretty much the way you explained, and the big "F" went away. I'm leaving shortly to do some pruning and will take the unit outside to see how it works.

EDIT

Had a chance to try the laser. Works perfect now after the changes you suggested. Aimed it through moist air and it immediately nails distance 400 ft. away, 1100 ft. away, etc.. As well and getting height of every tree I pointed it at regardless of the angle I aimed. Glad to know the unit is still in solid working order.
M. D. Vaden of Oregon = http://www.mdvaden.com

200 Pages - Coast Redwoods - http://www.mdvaden.com/grove_of_titans.shtml

Portraits & Weddings - http://www.vadenphotography.com

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Larry Tucei
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Re: LiDAR search reveals hidden gems

Post by Larry Tucei » Sun Dec 24, 2017 7:17 pm

Michael- Congrats on the finds! It is always a pleasure to see your posting from Cal. Larry

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