If you look carefully at the two screen shots above, there are more patches of imagery in the right hand image even though the only change made was to zoom in a little. The same place at slightly different zoom levels without adjusting the time slider. As you zoom in you should notice patches of images appearing in several stages. Zoom out as far as you can and then slowly zoom in. It should switch to historical imagery, change the date to November 1st, 2002 and centre the view over Europe. To see for yourself what we are talking about, load this KML file in Google Earth. The effect we are looking at today is similar in that the zoom level has an effect on what you see, but we think today’s effect is more of a bug or error, whereas the effects we have looked at in the past actually enhance Google Earth, as they provide access to extra imagery. Last year we had a look at a number of situations in which Google Earth shows different imagery depending on the zoom level. While looking around in historical imagery we discovered an interesting effect: the historical imagery is not correctly synced to the timeline when Google Earth is zoomed out. Last week we looked at animating historical imagery by using Google Earth Tours.
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