what i look for when i’m out surveying jonathan hazell 16 april 2013
TRANSCRIPT
What I look for when I’m out surveying
Jonathan Hazell
16 April 2013
What I look for when surveying
Where to start?
• in the words of the song “let’s start at the very beginning”• it’s worth spending [a lot of] time on this
© Jonathan Hazell Page 2
What I look for when surveying
What’s the brief?
• what does the client need to do with the output?• what therefore must be delivered?
© Jonathan Hazell Page 3
What I look for when surveying
How little do I need to do meet the brief?
• why spend longer on the job than you need to?• quantitative data is straight forward• species, location, size
• qualitative data is more subjective• how is tree hazard to be assessed?• how is visual amenity to be assessed?• what about any ecological value?
• some data may require research• fungal fruiting bodies, targets
© Jonathan Hazell Page 4
What I look for when surveying
Where to start?• Root • Crown• Stem
© Jonathan Hazell Page 5
What I look for when surveying
What’s the brief again?
• if an attribute is important, then assess and record it, for example• unique reference number• location• species• age• health• condition• safe useful life• preliminary management recommendations• targets
© Jonathan Hazell Page 6
What I look for when surveying
What to consider?
• species• characteristic appearance• typical life expectancy• susceptibility to certain conditions• known associations with pests and diseases
• environment• root disturbance• adjacent properties, structures or utilities
© Jonathan Hazell Page 7
What I look for when surveying
What to consider?
• logic• does the logic flow through, from initial survey to remediation?
• if not, change something!• if there are no concerns what’s the re-survey period?
• for some material if might be 20 years, for other it might be five• if concerns are raised, are they dealt with appropriately?
• is the re-survey period suitable?• does the proposed re-survey date take account of seasonal changes?• is the remediation prescription sensible?
© Jonathan Hazell Page 8
What I look for when surveying
Post-processing
• important to ensure that entries in all data fields are consistent• how will the data be managed – sort by address, prescription• minimise the number of treatments• link with an existing Schedule of Rates?
• post-processing may change some of the timings recommended by the surveyor• in general timings should be only be brought forward, not put back
© Jonathan Hazell Page 9
What I look for when surveying
Without a target a tree can not be a hazard
hazard
targetrisk
© Jonathan Hazell Page 10
the area of most interest is where all three overlap
What I look for when surveying
How to recognise hazard?
• how to recognise a tree hazard?• Body Language of Trees• Visual Tree Assessment
• how to assess the significance of a tree hazard?• how to record the findings?
© Jonathan Hazell Page 11
What I look for when surveying
What is the risk?
• how to assess risk?• how to record that assessment?
© Jonathan Hazell Page 12
What I look for when surveying
Is there a target?
• how to assess the target?• how to record that information?
© Jonathan Hazell Page 13
What I look for when surveying
What about visual amenity?
• how to recognise the value of a tree as a public amenity?• in certain situations this may be the preserve of a fellow
professional, such as a landscape architect
• how to record those findings?
© Jonathan Hazell Page 14
What I look for when surveying
Ecological value?
• how to recognise a tree’s ecological value?• this will often be the preserve of an ecologist
• how to record those findings?
© Jonathan Hazell Page 15
What I look for when surveying
Let’s not forget surveyor welfare
• these two are fairy ubiquitous in urban areas!
© Jonathan Hazell Page 16
What I look for when surveying
Overall, what’s most important?
• there are certain trump cards:• health and safety• nuisance
• these will generally be enough to override all other considerations
© Jonathan Hazell Page 17
What I look for when surveying
The judgment of Solomon
• how to balance all the competing and contrasting assessments that have been made?• how to explain the complexities to the client?
© Jonathan Hazell Page 18
What I look for when surveying
Don’t ever let anyone tell you surveying is easy!
© Jonathan Hazell Page 19