Using Google Earth like Lidar

General discussions of measurement techniques and the results of testing of techniques and equipment.

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Lucas
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Re: Using Google Earth like Lidar

Post by Lucas » Fri Jun 12, 2015 12:05 pm

Don wrote:Lucas
It depends on the satellite...much of the earlier satellite imagery was in Panchromatic (Black and White) or False-color InfraRed (appeared to be in normal color, for the most part). The 'mappingsupport' imagery sourcing says Aerial GoogleEarth Satellite...

Along the bottom, is probably the real source, DIGITAL GLOBE, but it is a company of incredible diverse imagery-capturing satellites and airborne platforms. I wasn't able to find enough metadata on your image to provide you with hard data.

That said, it appears to me that the image you've attached is a natural color image of 2-3m resolution, captured in the Fall (10-9-2013) and yes, each of the tree species you saw along the trail, and perhaps others will appear in natural color, for the day the image was taken.

I'm from the Western US so I won't pretend to make intelligent guesses as to color signatures, but your familiarity with the area, the species growing there, and what color each of the species would be at that time, may be as good an index of species on the image
-Don
http://www.mern.gouv.qc.ca/english/publ ... _Part2.pdf

Do you an amateur could make this work on Google Earth, etc. or is the resolution too low?
Last edited by Lucas on Fri Jun 12, 2015 12:11 pm, edited 2 times in total.
We travel the Milky way together, trees and men. - John Muir

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Lucas
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Re: Using Google Earth like Lidar

Post by Lucas » Fri Jun 12, 2015 12:06 pm

We travel the Milky way together, trees and men. - John Muir

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Don
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Re: Using Google Earth like Lidar

Post by Don » Fri Jun 12, 2015 4:12 pm

Lucas-
All three are valuable resources, although you'll probably find photo interpretation cues offered by them, to be rather subtle. The [www.mern.gouv.qc.ca] resource is most specifically helpful with it's pairing of natural color photography (or Red Green Blue (RGB) portions of the color spectrum) with Color Infra Red (CIR) photos.
This all gets complex pretty quick. My recommendation is to make a point of 'ground truthing' the imagery you showed us in an earlier post (Cabot Trail?)...actually going out, locating ground features visible in the photo, and if you're there at a similar time of year, comparing tree colors in photos with what is there in front of you,..you may not pick this up the first time, but continued practice will help.
Don Bertolette - President/Moderator, WNTS BBS
Restoration Forester (Retired)
Science Center
Grand Canyon National Park

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View my Alaska Big Tree List Webpage at:
http://www.akbigtreelist.org

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Lucas
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Re: Using Google Earth like Lidar

Post by Lucas » Sat Jun 13, 2015 2:21 pm

Don wrote: Along the bottom, is probably the real source, DIGITAL GLOBE, but it is a company of incredible diverse imagery-capturing satellites and airborne platforms.

Click on image to see its original size

http://time.com/3902025/vricon-3d-mapping/

http://www.vricon.com/home/

Developed as a joint venture between Saab Group", a Swedish aerospace and defense company, and DigitalGlobe, a purveyor of high resolution space and satellite imagery, Vricon uses automated algorithm to process DigitalGlobe’s massive archive of maps into highly accurate, data rich 3D models."
We travel the Milky way together, trees and men. - John Muir

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