LiDAR Coverage for the Eastern USA

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George Fieo
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Re: LiDAR Coverage for the Eastern USA

Post by George Fieo » Tue Dec 19, 2017 10:38 pm

M.W.Taylor wrote:I tried to process Patapsco Valley State Park and rolled snake eyes. The LiDAR is missing crown data and basically 2-dimenstional. The only LiDAR set I could find for that area is from 2004 and of the lowest resolution I've seen. Will have to wait until higher resolution LiDAR comes out. Sorry I could not help you on this. Attached is the map of the area I downloaded LiDAR for and the name of the LiDAR files from the original source.


2004 MD DNR LiDAR Anne Arundel, Charles Howard & Marys Counties
Thanks Michael,

Your definitely on the nice list this year with all the LiDAR data coverage.

I was in Patapsco Valley SP yesterday in the area dead center of the tile. Very promising. I measured eight tulips over 150' and recorded a new height record white ash for Maryland. Rucker Index is 129.83' and should hit the mid 130's.

George

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a_blooming_botanist
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Re: LiDAR Coverage for the Eastern USA

Post by a_blooming_botanist » Tue Jan 16, 2018 4:29 pm

Michael,

I would like to take you up on your kind offer, if it still stands. I have been exploring several adjacent pieces of conservation land in Petersham, MA, which are owned by Harvard Forest, the Trustees of Reservations, and Mass Audubon, respectively. The area of interest roughly follows the East Branch of the Swift River from just northeast of Connor Pond in a southwest direction toward the Quabbin Reservoir. I have included an image showing the area to which I am referring.
Petersham MA area of interest.jpg
I’ve found several eastern white pines that stand just over 140’ tall, but my search of the terrain has not been exhaustive. I’d be curious to see what the LiDAR data show…

Also, can you recommend any learning material for getting into processing LiDAR? I would love to be able to do this myself some day.

Many thanks,
Jared

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AndrewJoslin
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Re: LiDAR Coverage for the Eastern USA

Post by AndrewJoslin » Fri Jan 19, 2018 1:43 pm

The area Jared is showing in Petersham was hit by the famous F4 or F5 (different opinions) Worcester tornadao of 1953. I've heard anecdotally that it initially touched down on the hill just to the west of Connors Pond. I was shown the physical path of the tornado in 1967, it crossed roughly over the southern third of Connors Pond headed east/southeast. it's clear where the tornado went through after Connors Pond, the successional growth in the path is visible vs. the bordering pre 1953 woods, at least it was in '67 ;-)

It's pretty neat that there are 140 footers in the area considering the tornado event. There should be evidence in the crown forms of any older standing pines and other tree species remaining near the path, broken tops/regrowth etc. Clearly tornado damage can be extremely local to the path and it would make sense that the standing 140's on theses lands were unaffected or marginally affected by the storm.

LIDAR visualization may actually show the tornado path, that would be cool.
-AJ

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M.W.Taylor
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Re: LiDAR Coverage for the Eastern USA

Post by M.W.Taylor » Fri Jan 19, 2018 3:15 pm

I just processed LiDAR for the Petersham area. There area a handful of 150' class trees in there with tallest at 154'. Will post the LiDAR images later today when I get a better internet connection. For some reason my satellite connection at home will not allow me to post pictures on this BBS, only text.

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M.W.Taylor
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Re: LiDAR Coverage for the Eastern USA

Post by M.W.Taylor » Fri Jan 19, 2018 8:29 pm

See attached LIDAR area processed and height banded images. In "swifteast3" image, II increased the white banding to 150 ft to highlight the tallest. Yellow = 100 feet, red = 120 and white = 140 feet except for one image.
Attachments
Petersham LiDAR.jpg
white increased to 150ft to highlight the 4 or so 15-' class trees. Tallest is 154'
white increased to 150ft to highlight the 4 or so 15-' class trees. Tallest is 154'
swifteast3-140ft white.jpg
swifteast2.jpg
swifteast1.jpg

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AndrewJoslin
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Re: LiDAR Coverage for the Eastern USA

Post by AndrewJoslin » Tue Jan 23, 2018 2:16 pm

I did a mapping of "swifteast3" (contains the 150' range LiDAR hits) to a satellite view that I pieced together. I can make it available to Jared for ground verification. Individual trees in the satellite view can be matched to the LiDAR hits. Jared may be all over this and already measured the trees, would not be surprised ;-)
-AJ

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a_blooming_botanist
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Re: LiDAR Coverage for the Eastern USA

Post by a_blooming_botanist » Thu Jan 25, 2018 10:58 am

Michael,

Wow! Thank you for doing this analysis of LiDAR data! I am excited that there appear to be several 150’+ trees in there! I have plans tomorrow to get back into those woods to verify.

Andrew,

Thank you for giving some of the history of this area. It’s pretty unbelievable that one of the deadliest tornados on record in the US touched down in this river valley. As you say, there is a lot of younger growth that dates back to this event, but there are also many trees that bore witness to the storm and that bear scars to prove it.

Jared

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JHarkness
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Re: LiDAR Coverage for the Eastern USA

Post by JHarkness » Tue Jul 03, 2018 2:56 pm

Hi Micheal,

If you don't mind, could you please post the LiDAR data for Wyantenock State Forest on the north side of Dean Hill in Cornwall, Connecticut? It should take two or three tiles, the center of the target area is at 41.8250 x -73.3527. Also, would you mind explaining where on Earth Explorer or NOAA's Data Access Viewer colored LiDAR data can be downloaded? All I could find was black and white imagery and low resolution colored imagery that displays the elevation above sea level of the canopy, which isn't all that useful if you don't know the exact height of the terrain.

Thanks,
Joshua
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