Mapping

http://google-latlong.blogspot.ca/2012/04/balloon-and-kite-imagery-in-google.html

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http://www.dolookdown.org/2012/11/28/map-knitter-open-source-diy-science/

http://grassrootsmapping.org/

Did Columbus plan his voyage based on this map? http://www.smithsonianmag.com/history/did-this-map-guide-columbus-180955295/