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Airleaf
Aerial study of a dense urban district organized around a green corridor
All Taiwan reports

City report · Taiwan

Douliu

Measured across a 2 km radius around Douliu, Jiadong Village, Douliu City, Yunlin County, Taiwan 640 (12.57 km²)

Tree cover
40.5%
Air quality
55Moderate
Trees in this area
127K
More trees needed
0
Area analyzed
12.57 km²
Satellite image
Sep 18, 2026
Dark green marks tree cover detected inside the study radius.Sentinel-2 L2A (ESA Copernicus) via Earth Search, captured Sep 18, 2026

Douliu's tree count comes to 127,235 trees across 12.57 km² — already at or above the 30% tree-cover level considered healthy for this area. Air quality currently reads AQI 55 (Moderate): Unusually sensitive people should consider limiting long outdoor exertion.

Tree cover detail

Healthy tree cover

40.5% tree cover against a 30% healthy-neighborhood target, across 12.57 km².

Target reached

Trees in this area

127,235

Target trees

127,235

More trees needed

0

CO₂ if planted / yr

0 kg

Air quality detail

AQI 55Moderate

Observed Sep 28, 11:00 local time via Open-Meteo / CAMS, US EPA index. Values in µg/m³.

Model estimate · no ground station nearby

Health signal

Unusually sensitive people should consider limiting long outdoor exertion.

PM2.5

14.2

PM10

19.1

NO₂

7.8

O₃

114.0

SO₂

17.2

CO

228.0

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Douliu tree cover and air quality — measured by Airleaf
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Frequently asked

Questions about Douliu

What is the tree count in Douliu?

Douliu has an estimated 127,235 trees across the 12.57 km² measured — 40.5% tree cover, already past the 30% tree-cover target set for this area.

How many more trees does Douliu need?

Douliu has already reached its tree-cover target, so no additional trees are needed to close the gap.

What is the air quality (AQI) in Douliu right now?

The latest reading for Douliu shows an AQI of 55 (Moderate), observed Sep 28, 11:00 local time via Open-Meteo / CAMS, US EPA index. Unusually sensitive people should consider limiting long outdoor exertion.

How is Douliu's tree cover and air quality measured?

Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search satellite imagery at 10 m detail across a 2 km radius around Douliu; the tree count is an estimate derived from that cover. Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors.

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Methodology. Tree cover is measured from Sentinel-2 L2A (ESA Copernicus) via Earth Search imagery at 10 m detail for the stated radius; the tree count is an estimate derived from that cover. Air quality comes from ground monitoring stations via OpenAQ where one reports nearby, and otherwise, as here, from the Open-Meteo / CAMS model, which may differ from street-level monitors.