American artist Karen O’Leary reimagines the map as an exchange of negative and positive space. Deftly cutting maps of New York, Paris and London with razor precision, she leaves delicate webs of streets as land and water are cut away. Negative space demarcates land, while meandering grids of paper represents streets.
There is an interview with the artist here.
More information about this work:
http://infosthetics.com/archives/2009/11/hand-cut_maps.html
http://www.coolhunting.com/archives/2009/11/karen_olearys_c.php
ART & CARTOGRAPHY 
great work!!!