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Google Earth software features historical data on several places around the world. We have, among the software icons, the clock icon that we can select to view the historical imagery in a time series. It is enough to select the icon and use the given sliding tool to view the progress of the selected location through time. In fact, using Google Earth and its gallery of images, we can time travel to see the natural evolution of a place or the bustling development of urban areas. Let us note that the software is archiving satellite and aerial imagery too. Then we have a large part of England and some of the Italian towns, covered by images of 1943 or 1945. In this manner we can easily evaluate the processes linked to urbanization of such covered areas, after the World War II.
Some references on the use of Google Earth for studying urbanization are [1-3].
Using Google Earth while preparing an article of a site in Washington given in the reference .
 Monkkonen, P. (2008). Using online satellite imagery as a research tool mapping changing patterns of urbanization in Mexico. Journal of Planning education and research, 28(2), 225-236.
 Yu, L., & Gong, P. (2012). Google Earth as a virtual globe tool for Earth science applications at the global scale: progress and perspectives. International Journal of Remote Sensing, 33(12), 3966-3986.
 Taylor, J. R., & Lovell, S. T. (2012). Mapping public and private spaces of urban agriculture in Chicago through the analysis of high-resolution aerial images in Google Earth. Landscape and Urban Planning, 108(1), 57-70.
 Sparavigna, A. (2016). Alignments to sunrise and sunset on solstices in the layout of Lafayette Square, Washington. PHILICA.COM Article number 601.
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This Observation was published on 7th November, 2016 at 19:45:53 and has been viewed 598 times.
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Sparavigna, A. (2016). Urbanization in Google Earth time series. PHILICA.COM Observation number 141.