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Alstonia scholaris

Blackboard tree · Family: Apocynaceae · ID 36296 · alive · Condition: fair · LC · Least Concern · Elevation: 29.9 m

Photos

3D point cloud drag to rotate · scroll to zoom

trunk branches leaf

Dimensions

11.96 mHeight
2.99 mTrunk height
22 cmTrunk diameter (DBH)
8.64 mCanopy height
7.72 mCanopy width
24.28 mCanopy circumference
45.25 m²Crown projection area
276.58 m³Crown volume
1Stems

Structure & risk

55Slenderness (H/D)
0.4Safety factor (default wind)
1.3 °Leaning angle
4.39 °Trunk lean angle
0.03Competition index
2.61 mTree protection zone
3.92 mRoot protection zone
l1TMS category

Health & vitality

fairCondition
lowVitality
matureAge class
moderately defoliatedCrown transparency
52.54 %Foliage transparency
0 %Dieback
55.05 %Crown density
99.95 %Crown light exposure ratio
72.28 %Live crown ratio
200.56 m²Leaf area
4.44Leaf area index (LAI)
0.73Leaf area / crown vol.

Ecosystem services

76.83 kgCarbon storage
24.21 kgCarbon sequestration / yr
63.97 kgOxygen production / yr
0.13 m³Avoided runoff
2.26 m³Water intercepted
2.66 m³Transpiration
2.24 m³Evaporation
13.83 m³Potential evapotranspiration
5.01 gCO removed / yr
19.78 gNO₂ removed / yr
42.68 gSO₂ removed / yr
12.45 gPM2.5 removed / yr
238.37 gO₃ removed / yr

Surroundings

noneOverhead utilities

Amenity valuation

1627.32CAVAT value
10053.43Koch value
1015.35RADO value

Other

2026-04-24G u fextracted_change date
06:02:15G u fextracted_change time
45G u fextracted_critical wind speed
2025-06-16G u fextracted_inv date
Jalan P11GG u fextracted_street
7103G u fextracted_taxon i d
3.52Crown base height
12.15Live height

Clearances

ClearRoad clearance

Not provided Catalogued metrics with no value for this tree — measured, derived or analysed alike. Listed rather than hidden so absence is visible instead of inferred.

Girth — the survey did not record which measurements were availableGrowth formCrown light exposure — the survey did not record which measurements were availableOutlier index — the survey did not record which measurements were availableTrunk measuredCrown measuredSpecies identified

Location

Jalan P11G · 2.965482, 101.665935 · Elevation 29.9 m