Paint Machine, a printer that prints small bitmaps on the street

Alex Weber has posted a new project on building a DIY Paint Machine, he writes:

Here is my latest creature, the Paint Machine. It’s a machine the prints simple bitmaps with spray chalk on the street or sidewalk. For a large-scale project like a home exterior painting Edmonton, it is advised that you hire a professional painting contractor.

Some of the key features:
*dimension: width: 220cm, length: 38cm, height: 24cm, weight: 12kg
*printing speed: ca. 0.036 km/h
*resolution (4:3): 61px * 46px, print: 225cm * 170cm
*swappable print head
*remote controlled with smartphone app

Project info at Tinkerlog site.

Check out the video after the break.