Gigapixel image

A gigapixel image is a digital image bitmap composed of one billion (109) pixels (picture elements), 1000 times the information captured by a 1 megapixel digital camera.

A square image of 31,623 pixels in width and height is one gigapixel.

Current technology for creating such very high-resolution images usually involves either making digital image mosaics of many high-resolution digital photographs or using a film negative as large as 12" × 9" (30 cm × 23 cm) up to 18" × 9" (46 cm × 23 cm), which is then scanned with a high-end large-format film scanner with at least 3000 dpi resolution.

Though currently rare, there have been a few instances such as the Microsoft Research Terapixel project for use on the Fulldome projection system,[3] a composite of medical images by Aperio,[4][5] and Google Earth's Landsat images viewable as a time-lapse are collectively considered over one terapixel.

[6] In 2015 the 'Terabite', the world's first terapixel macro image, was released by GIGAmacro.

Gigapixel image of František Kupka 's The Cathedral from the Google Art Project . The version shown here has been downsampled to 746.7 MP due to constraints in the JPEG format, but the image is available in original resolution as a tile set on the file description page.
Lucas Cranach l'Ancien, Portrait d'une noble dame saxonne (1534), musée des Beaux-Arts de Lyon . Watch this picture in gigapixel in the MBALYON website .
A gigapixel rendering of a 2D fractal (~2.15 gigapixels).