NYC allergenic tree-pollen potential

An annual, time-agnostic screening of where potentially allergenic street-tree sources concentrate—from Census Tracts to individual trees.

ATPI is a relative source-potential index. It is not pollen concentration, personal exposure, or probability of developing an allergy.

Map controls

Basemap

Census Tract overlay

Current zoom expression

Census Tract potentialArea-level ATPI normalized within NYC

How ATPI is calculated

1 · Tree basal area

BAᵢ = π × (DBHᵢ × 0.0254 ÷ 2)²

2 · Individual raw potential

Pᵢ = Wᵢ × ln(1 + BAᵢ ÷ 0.01)

3 · Relative individual index

ATPIᵢ = min(100, 100 × Pᵢ ÷ Q₉₉(P))

4 · Census Tract index

Dₜ = ΣPᵢ ÷ areaₜ
ATPIₜ = min(100, 100 × Dₜ ÷ Q₉₉(D))

Q₉₉ is NYC’s 99th percentile. Scores are relative within this dataset and are not percentages or clinical probabilities.

1 · 单棵树胸高断面积

BAᵢ = π × (DBHᵢ × 0.0254 ÷ 2)²

2 · 单棵树原始潜力

Pᵢ = Wᵢ × ln(1 + BAᵢ ÷ 0.01)

3 · 单棵树相对指数

ATPIᵢ = min(100, 100 × Pᵢ ÷ Q₉₉(P))

4 · Census Tract 指数

Dₜ = ΣPᵢ ÷ 区域面积ₜ
ATPIₜ = min(100, 100 × Dₜ ÷ Q₉₉(D))

Q₉₉ 是纽约市第 99 百分位。分数仅表示本数据集内的相对位置，不是百分比或临床概率。

Taxon evidence weights (W)

NYC priority1.00Documented concern0.60Unknown / minor0.25Low concern0.05UnclassifiedNA

Weights are transparent exploratory assumptions; the evidence classes follow NYC-specific pollen research. Katz et al. 2024.