UKTC Archive

RE: Plotting groups

Subject: RE: Plotting groups
From: Howe, Ron
Date: Dec 12 2008 11:06:59
Brendan,

Why should a group of trees should be treated any differently to say a
multistem tree, as long as you identify the faults and deal with them. A
group of one species is a cohesive unit.


Ron Howe
Planning Tree Officer
Mole Valley District Council
Pippbrook
Dorking
RH4 1SJ
Direct Tel. 01306 XXX XXX


-----Original Message-----
From: brendantuer@xxxxxxxx.co.uk [mailto:brendantuer@xxxxxxxx.co.uk] 
Sent: Fri, 12 December 2008 10:55
To: UK Tree Care
Subject: Plotting groups

Question: Tree databases.

Plotting trees in groups is more cost effective.  It provides data which
is easy to understand and easy to re-visit, (especially when compared
with lots of confusing, individual records).  But does a methodology
which promotes the surveying of the majority of trees as groups, offer a
robust defence against litigation?

Let's say, "Bob" surveys 10 trees in a collective group.  They are
generally in fair health but with some minor defects.  They are located
next to a public highway.  Bob surveyed them all in detail at the time
of inspection, but the methodology requires one generalised record for
the collective group.  We know that all trees are slightly different and
a single database entry for a group of trees will only ever record the
"average tree" within the group.  

Now lets say one of the trees, fails.  The expert witness for the "other
side" says what he is paid to say, "there was clear evidence that the
tree would fail."  If we assume that "Bob" surveyed the trees properly
(and yes, with hindsight, the tree should have been plotted as an
individual, but the same applies to most of the others), is there an
obvious problem with a methodology which promotes plotting trees as
groups wherever possible?  Will such a methodology provide a robust
defence against litigation?  

Now lets apply the same scenario to a woodland.  There are over 1,000
trees and again, a general note appears within the database.  One of the
trees fails...
 
Any thoughts?
Brendan









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