Report - DCE - Nationalt Center for Miljø og Energi

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To be able to distribute the emissions on 1x1 km it is necessary to split the
industrial polygons between the grid cells and thereby be able to calculate
the industrial area in each grid cell. These functionalities are available in
GIS, in this case ArcMAP. The split is made using the intersect tool, and afterwards
the areas are applied to each cell using the Calculate Area function.
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The remaining part of the emission distribution for industrial processes is
carried out in a database. The share of the national emissions that should be
allocated to each grid cell is calculated as the industrial area of the cell divided
by the total industrial area. The same distribution key is applied for all
pollutants.
In the case of the Industrial Processes sector only one map is combined with
the grid, but more maps or layers could be combined to make a distribution
key. This is the case for some sources in the agricultural sector, e.g. emissions
from organic soils where the distribution key is based on a map of organic
soils, a map of the agricultural fields and the Danish Grid Net. A
number of area sources are distributed on line features, e.g. emissions from
railways and road traffic. In these cases the lines are split into segments by
intersection with the 1x1 km grid net. The emission in each grid cell is calcu-