This 20,116,547,880-pixel zoomable digital photograph of Hong Kong Island is composed of 3,115 individual images taken from the same viewpoint at the International Commerce Center on April 1, 2011 over a span of approximately an hour.
For more information, see the image web site:
http://www.cse.ust.hk/panorama/icc1/
The photo was taken by members of the RioHK group based at the Hong Kong University of Science and Technology.
Check also this image at the Gigapan site, where you can
save snapshots and post coments.