Figure 11.

Calculation of the geographical centre of the residents' real estates within each 1 × 1 kilometre grid cell. Small grid cells: grid cells for modelled annual mean of NO2 (250 × 250 m). Large bold grid cell: 1 km2. Small black dots: the centre coordinates of the real estate (according to the National Registry) for each individual in population data set PD1. Black centre cross: the generalised position of the individual's real estate, within the specific km2, according to population data set PD2. White crossed circle: calculated geographical centre of the residents' real estate within the specific km2. White-edged grid cells: the cells within the concentration grid which, through bilinear interpolation were used to assign an NO2 exposure value to the individuals in the repositioned PD2.

Stroh et al. International Journal of Health Geographics 2005 4:30   doi:10.1186/1476-072X-4-30
Download authors' original image