Made up up 2,000 individual images electronically stitched together, if printed out at a standard photo resolution of 300DPI, it would be 18 meters or 57 feet wide, and 9 meters / 28 feet tall.
http://www.dailymail.co.uk/sciencetech/article-3475426/New-York-s-skyline-ve-never-seen-Stunning-interactive-20-Gigapixel-panorama-revealed.html?ITO=1490&ns_mchannel=rss&ns_campaign=1490