'Sexy' iPad Maps: A Designer's Interactive New York Streetscapes - Steven Heller - Life - The Atlantic: "Exploring the dimensions and sex appeal of maps has always been my motto," states Stephan Van Dam, the inventor of the UNFOLDS® pop-up map and most recently, the 4DmApp iPad map app. For over 20 years Van Dam has made accessible city maps with that je ne sais quoi. Well actually, he knows very well what he's doing. He's making functional maps that owing to paper technologies add levels of interactivity to an otherwise flat experience. Currently he is using gaming software to make city maps that totally involve the user in the interface—and that is, well, truly sexy.