The cities on this site maintain a consistent superimposed grid for direct comparisons of scale and size. By utilizing the above toolbar, you can compare the differences in city footprints and densities. Density calculations and supplemental information are available in the sidebar on each page. Aerial images are available for updated cities on the page links below.
When an image is clicked, the grid size changes and the image expands to the full extent currently mapped in order to depict neighboring towns and unattached villages. This option is only available for some cities, and only for viewing one city. When this option is available, a notice displays in the sidebar. In the viewer, the full extent image can be expanded by clicking for greater resolution.
Multispectral analysis:
Atlanta, Georgia, 2005
Beijing, 1990 and 2005
Cairo, Egypt, 2005
Calcutta, India, 2005
Istanbul, 2000
London, England, 2005
Mexico City, Mexico, 2005
Milan, Italy, 2005
Paris, France, 2005
Pearl River Delta Urban Agglomeration, 2000
Randstad, The Netherlands, 2000
Rome, Italy, 2000
San Francisco Bay Area, California, 2000
Tianjin, 2005
Feature extraction analysis:
Beijing, China, 2010
Istanbul, 2005
Mexico City, Mexico, 2010
Shanghai, China, 2005 and 2010
Tianjin, 2005 and 2010
