How convert canopy point to surface area?

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cjusto
Posts: 2
Joined: Thu Apr 30, 2020 3:05 pm

How convert canopy point to surface area?

Post by cjusto » Thu Apr 30, 2020 3:13 pm

Can you explain to me how convert a canopy point (i-Tree Canopy) to surface area in (km2)?
Thanks!
Jason.Henning
i-Tree Team
Posts: 203
Joined: Fri Dec 21, 2012 7:45 am

Re: How convert canopy point to surface area?

Post by Jason.Henning » Thu Apr 30, 2020 6:15 pm

Thanks for the question.
The tool is not converting individual points to area but it is converting the percentages. If 25% of your sample points are classified as tree canopy then the sampling assumption is that 25% of the area is tree canopy. If the total area within your boundary of interest is 200km² then .25*200km² = 50km² of tree canopy.
This same conversion works for any of the covertypes and if you apply it to each covertype and sum those areas you will get the total area within your boundary of interest.
This is a linear transformation and which is why the percent cover and area can both be reported on the same graphs in the i-Tree Canopy reports.
-Jason
A member of the i-Tree Team
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