The figures presented do not show the change in land taken by urban and other artificial areas, but the proportion of land-cover categories as a result of a single series of satellite images by the Corine Land Cover (CLC) studies in 2000. The information for Albania, Bosnia and Herzegovina and Croatia has been estimated by performing a rudimentary colour pixel count over the 2000 pre-processed CLC images of the countries in order to be able to include them in the land cover study along with the Former Yugoslav Republic of Macedonia and Serbia, who did provide data on land-cover.
