| Ref |
|
[1]
|
|
| Common |
🛈
The common name of the tree species
|
Portugal laurel
|
|
| Latin |
🛈
The Botanical name of the tree species.
|
Prunus lusitanica
See
|
|
| Species data |
|
Species data on ToB
|
🛈
"https://bristoltrees.space/Tree/species/" || $self/Latin
|
| BS5837 Category |
🛈
This is the condition code assigned to the tree as defined in BS5837: This
British Standard gives recommendations and guidance on the relationship between
trees and design, demolition and construction processes.
|
C2
|
|
| Tree ID |
🛈
ID used in the Tree survey
|
T001
|
|
| Onsite Trees |
🛈
The number of trees of this species currently on the site, alone or in a
group
|
1
|
|
| To Remove |
🛈
The number of trees to be removed post-developement
|
0
|
|
| DBH cm |
|
67
cm
|
|
| Native |
🛈
Native trees contribute more to the biodiversity of a site
|
No
|
🛈
((table('Species')[Botanical_name = $self/Latin]/BNG_native)[1],"No")[1]
|
| Class |
🛈
Trees are placed in a size class depending on its DBH
|
Large
|
🛈
table('Tree_Size_Class')[number($self/DBH_cm) >= Low_DBH][number($self/DBH_cm) < High_DBH]/Class
|
| Computed Criteria |
🛈
This is a list of the criteria codes defined in the Tree_Criteria
list
|
B,C,D
|
🛈
string-join((if ($self/Native="Yes") then "A" else (),"B",if (number($self/DBH_cm) > 60) then "C" else (),"D",if (number($self/DBH_cm) > 100) then "E" else ()),",")
|
| Surveyor Criteria |
|
|
|
| Criteria |
|
B,C,D
|
🛈
($self/Surveyor_Criteria,$self/Computed_Criteria)[1]
|
| Condition Assessment Count |
|
3
|
🛈
count(tokenize($self/Criteria,","))
|
| Condition Assessment |
|
Medium
|
🛈
if ($self/Condition_Assessment_Count >= 5) then "Good" else if ($self/Condition_Assessment_Count >= 3) then "Medium" else "Poor"
|
| Nominal DBH cm |
🛈
This is the DBH in cm of the size class of the tree
|
90
cm
|
🛈
table('Tree_Size_Class')[Class=$self/Class]/Nominal_DBH
|
| RPA m |
🛈
RPA or Root Protection Area is a standard of estimating the cnaopy size
based on the DBH
|
366.44
m
|
🛈
let $RPA_radius_m := $self/Nominal_DBH_cm * 12 div 100 return math:pi() *
$RPA_radius_m * $RPA_radius_m
|
| RPA ha |
|
0.0366
hectare
|
🛈
$self/RPA_m div 10000
|
| RPA baseline |
🛈
The total RPA in hectares for the original number of trees
|
0.0366
hectare
|
🛈
$self/RPA_ha * $self/Onsite_Trees
|
| RPA retained |
🛈
The total RPA in hectares of the trees retained
post-development
|
0.0366
hectare
|
🛈
$self/RPA_ha * ($self/Onsite_Trees - $self/To_Remove)
|
| RPA lost |
🛈
The total RPA in hectares lost post-development
|
0.0
hectare
|
🛈
$self/RPA_ha * $self/To_Remove
|