Fig. 4
From: The methodology of quantitative risk assessment studies

Spatial resolutions of various air pollution (nitrogen dioxide) exposure models developed in a middle size city. a Estimates based on permanent background monitoring stations; b geostatistical model relying on a fine-scale measurement campaign; c dispersion model taking into account emission and meteorological conditions; d Land-use regression model relying on the same measurement points as geostatistical model (b) [50]