[CANUFNET] Relationship DBH/canopy width

[Alice Casselman]

Hi Peter
We have thousands of tree data in one Hectare forest plots in different parts of Ontario.
all species over 4 cm DBH have been measured but not always for crown width as that was a later protocol
The program is called 
Go Global
 you can reach this data. www.acer-acre.ca and search to add more trees to your research.
Great to hear from you
Alice for ACER 


Sent from my iPhone

> On Jun 28, 2016, at 11:22 AM, Peter Duinker <Peter.Duinker at Dal.Ca> wrote:
> 
> Darren:
>  
> I have a graduate student measuring street trees right now in Halifax.  He will end up with a couple of thousand trees measured for crown width and DBH.  We will have high-“n” regressions for estimating crown width from DBH for American elm, Norway maple, and European linden.  I know already, though, that the relationships are not tight, so even with high “n”, there will be considerable uncertainty in estimates.  We can share these regressions only in September or October, when data collection has finished.
>  
> Cheers, Peter
>  
> Peter N. Duinker, PhD, P.Ag.
> Professor
> School for Resource and Environmental Studies
> Faculty of Management
> Dalhousie University
> 6100 University Ave.
> Halifax, Nova Scotia, Canada
> B3H 4R2
> Phone: 902-494-7100
> Cell: 902-229-5141
> Fax: 902-494-3728
> Email: peter.duinker at dal.ca
> http://www.dal.ca/faculty/management/sres/faculty-staff/our-faculty/peter-duinker.html
>  
> From: CANUFNET [mailto:canufnet-bounces at list.web.net] On Behalf Of Darren Platakis
> Sent: June 28, 2016 12:00 PM
> To: Canadian Urban Forest Network <canufnet at list.web.net>
> Subject: [CANUFNET] Relationship DBH/canopy width
>  
> Hello everyone, 
>  
> Is anyone aware of information or a chart of some sort that indicates the relationship between DBH and canopy width for various tree species? 
>  
> Eg, 
>  
> Sugar maple with diameter "x" on average, has a canopy width of "y".
>  
> I understand that this is a very over generalized question and there are multiple variables involved. I was hoping that there might be something akin to a trigonometry table available somewhere.
>  
> I'm looking to perform some canopy analysis and would like to create buffers representing canopy width for different tree species based on their diameters.
>  
> Any links would be greatly appreciated.
>  
>  
> Best Regards, 
>  
> Darren Platakis 
> (H)BSc. Geog., GIS (PG), FRCGS
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