I made a photo of this drawing pasted on the wall out on the street. Googling for the artist, I came across Art In Cities. This site is a growing collection collection of photo’s of grafitti’s, stencils, stickers, etc. that are snapped on the street by people like you and me.
“Cities are like a huge art gallery with a permanently changing exhibition. Art is submitted everywhere and constantly. The art is not made by the direction of an institution or company, but are short personal notes, big fascinating projects or intriguing protests. With graffiti, posters, stickers, stencils, etc the individual artists use the city as an art gallery.”
They should be able to do some geotagging using a geocoder …