First page Back Continue Last page Overview Text

Notes:


To get URLs for objects outside and far away we use a combination of GPS and magnetic compasses in a system we call “WebSign”. A program on a handheld PDA reads the GPS and compass values and computes a rooted vector and a cone of acceptance around it. Then the cone is projected on a database of (position,radius) pairs and any hits are read out as URLs. The user experiences a wand-like device that appears to sense URLs in the distance. The database itself can be downloaded from web servers for each geographical area. For more information on websign see Salil Pradhan’s article in Computer August 2001. Websign: Hyperlinks from a Physical Location to the Web and http://www.hpl.hp.com/techreports/2001/HPL-2001-140.html