In a previous post on this website I looked at urban mapping showing population changes in London. This time I dug up a different example for mapping cities from my map archive: The German city of Cologne (Köln) is one of Germany’s largest cities with a total population of approximately 1 million people. It its over 2000 years lasting history, its urban landscape changed considerably, and since the Prussian times in the 19th century fairly good mapping records cover the modern land use change from the pre-industrialised to the post-modern city. In a GIS mapping project some years ago, these changes have been digitized in full detail from some major topographic maps, covering the changes in the urban land use since 1850 (see bottom image of this page for the legend to this animation):

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