A gallery comparing composite sketches of crime suspects, as drawn by police officers, with photos of the actual people they depict.

“The Island”, a not exactly microscopic hand drawn map of London, by British artist Stephen Walter.

The Island satirises the London-centric view of the English capital and its commuter towns as independent from the rest of the country.

Using infrared imaging technology, a sketch by Renaissance artist Michaelangelo, of his sculpture “Bruges Madonna”, has been found underneath another of his drawings, and suggests he based the famous sculpture on a male, rather than female, model.

Similar techniques have uncovered erased works by Leonardo da Vinci, Raphael, and other Renaissance artists, with the practice of reusing the same sheet of paper for sketches being common at the time due to its hefty cost.

Renaissance artists often reused the same piece of paper for sketches, because the material was so expensive in the 1500s. They would rub out their drawings with stale bread, an early form of eraser. Using infrared imaging which reveals traces of residual carbon left by charcoal and black chalk, the British Museum has detected the underlying drawings.

Joey Parlett’s series of 36 sketches based on photos taken mainly during the Apollo Moon missions.

Budapest based freelance illustrator Lehel Kovács has created a series of sketches based on Google street view photos.

Guess the title of the movie using a collection of just six sketches as clues… some are more straightforward than others.

Leigh Walton’s Tintin themed sketchbook which so far comprises the work of 100 artists.

Matt Sundstrom spent eight days driving from New Hampshire to Oregon and drew sketches of the journey.

A great collection of sketches of Luxembourg and surrounds by Belgium based artist Gérard Michel.

Flickr members’ sketches of their work outfits at What I Wore Today (drawings only!).