Background image from http://www.openstreetmap.org - CC-BY-SA 2.0 copyright OpenStreetMap.org and contributors. Note: This appears to be OpenStreetMap map display from back in 2006 when community contributed wiki style mapping project had very sparse coverage even in central London, and the map display was very rudimentary, showing data with white lines layered over NASA Landsat imagery. Works reasonably well for this illustration though
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share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.