Cm or mm, I see a lot of reports that measure at 1.3m from ground level (and
always in cm)... The use of this height generally comes from the forestry
background lads....
Cheers
Paul Hawksford
Principal Arboriculturist
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From: CharlesB@xxxxxxxxx.gov.uk
To: uktc@xxxxxx.tree-care.info
Subject: RE: BS5837 Redundant zeros
Date: Tue, 24 Apr 2012 12:48:18 +0000
BS 5837:1991 , 2005, & 2012 all give trunk diameter measurements in mm for
the purpose of determining RPA's. I doubt anyone would care what
measurement is used, so long as we all use it, use it consistently, and
it's clear.
Maybe a change from mm to cm will be something for the next revision. Or a
choice of either mm or cm, as that is what appears to be being used anyway.
Just so long as we are all consistent.
Charles Bennett
Landscape Architect/Tree Officer
Economic Development
Carlisle City Council
Civic Centre
Carlisle CA3 8QG
Direct Dial: (01228) 817535
Email: charlesb@xxxxxxxxx.gov.uk
-----Original Message-----
From: Luke Steer [mailto:luketreescapes@xxxxxxxxxxx.com]
Sent: 24 April 2012 13:22
To: UK Tree Care
Subject: Re: BS5837 Redundant zeros
We give our tree diameters in cm and, to my knowledge, no one complains or
miss-interprets our reports. Using cm numbers also takes up less room in
tables.
Regards
Luke Steer
Chartered Arboriculturist
Treescapes Consultancy Ltd.
Tel: 015394 34698
Mobile: 07734 113964
www.treescapesconsultancy.co.uk
-----Original Message-----
From: "Rupert Baker" <rupert_baker@xxxxxxxx.co.uk>
Date: Tue, 24 Apr 2012 13:12:10
To: UK Tree Care<uktc@xxxxxx.tree-care.info>
Reply-To: uktc@xxxxxx.tree-care.info
Subject: RE: BS5837 Redundant zeros
But no-one is asking to go back to inches; or 1/4-girth inches, or Petrograd
standards, or any other obsolete measure. The whole tree industry in UK,
from nursery stock-producers to tree-surgeons, foresters, TO's, and
consultants, has worked with girth in cm; adding extra zeros as digits only
increases the chance of error and confusion. Additionally, given the likely
margin of error for a girth/dbh measurement as being around 1cm (depending
on what point you measure on the stem; whether you use calippers or a tape,
etc; let alone the fact that trees are actively growing, and a young tree
will alter its dbh, let alone its girth, by well over a cm/year, what on
earth is the point of using mm?
Rupert
-----Original Message-----
From: Charles Bennett [mailto:CharlesB@xxxxxxxxx.gov.uk]
Sent: 24 April 2012 11:24
To: UK Tree Care
Subject: RE: BS5837 Redundant zeros
Consistency in defining the appropriate units of measurement is all.
Especially if you are into moon shots, or Mars shots. You wouldn't want to
confuse miles and kilometres and miss the target now would you.
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