Crown shadows?

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Lucas
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Crown shadows?

Post by Lucas » Fri Jul 03, 2015 1:52 pm

http://www.flashearth.com/?lat=45.60298 ... =0&src=msa

Are the dark spots Crown shadows or Crown gaps?

They look more like gaps in Google earth.

If they are emergent shadows they may be useful to waypoint and check.
We travel the Milky way together, trees and men. - John Muir

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Don
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Re: Crown shadows?

Post by Don » Sat Jul 04, 2015 6:24 pm

Might they be a different species of tree, with a different crown color signature?
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Rand
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Re: Crown shadows?

Post by Rand » Sat Jul 04, 2015 7:13 pm

Lucas wrote:http://www.flashearth.com/?lat=45.60298 ... =0&src=msa

Are the dark spots Crown shadows or Crown gaps?

They look more like gaps in Google earth.

If they are emergent shadows they may be useful to waypoint and check.
No sure there is a cut and dried answer to this one. If you pan over to a clearing/road, you can clearly see the sun was rather low in the sky, casting some pretty dramatic shadows:
road.png
Next I took a screenshot into a image editor and adjusted the levels in an attempt to bring out a little more detail in the shadows:
levels.png
It looks like there might be a combination of the two going on. Honestly with the resolution of the photo, I'm not sure you can make a definitive call for a lot of the dark places, but some do look like emergent trees. The rest is really difficult to tell whether the trees are emergent or whether shadows are being cast into a canopy gap.

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Lucas
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Re: Crown shadows?

Post by Lucas » Tue Jul 07, 2015 8:09 am

Yeah it is tough to judge.

A hurricane blew down a lot of trees there 12 years ago. I thought some might be gaps.
We travel the Milky way together, trees and men. - John Muir

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Rand
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Re: Crown shadows?

Post by Rand » Tue Jul 07, 2015 10:54 am

Another trick you can do is invert the colors of the image and then run levels again:
0-b2.png
The shadows now look like 'flat spots'. Doesn't really help in this case, but might come in handy in the future.

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