Fig. 3: Hotspot scores in Kigali.
From: Detecting urban PM2.5 hotspots with mobile sensing and Gaussian process regression
In panel (a), the colour of every 200 × 200 m grid tile reflects the hotspot score estimated from the Gaussian process regression fit. Depicted are also illustrative Google Street View images from a hotspot (b) and coldspot (c) taken in December 2022 and February 2023, respectively. Hotspot scores were computed in every tile where there is at least one mobile sensing observation.
