The NAVSTAR system permits land, sea, and airborne users to determine their three-dimensional position, velocity, 24 hours a day, in all weather, anywhere in the world, with amazing precision. http://igscb.jpl.nasa.gov/
Wireless devices, WAP, Cellular, SATphones and a whole host of newly emerging appliances and indeed, new software applications, will all utilize some form of GPS or more likely GIS data retrieval. GIS stand for Geographic Information System and relies on exact Latitude and Longitude coordinates for location purposes.
Several car manufacturers currently utilize GPS for on-board driver assistance and the Marine and Trucking Industries have been using it for years. Obviously your web site is a stable beast. It sits on a server somewhere and doesn't move much, so at first glance it seems quite unplausible you'll need GIS Locational Data within your source code. On the contrary. One aspect your web site represents is your business's physical location(s) and if people are going to try to find your services and products, shouldn't you at the very least, tell them where it is and how to get there?
Let's look at it from the other end of the spectrum. The end user approach. Let's say you're vacationing in a new city for the first time. Once you get settled into your Hotel room, what's the first thing you want to find? Restaurants? Bank machines? Stores? So you pull out your hand-held, wireless, device, log onto the web and search for "Italian Food in San Francisco." Five Hundred results come back so you click the new "location" feature on your hand-held (which knows exactly where you are) and ten Italian restaurants, who were smart enough to code their web sites with GIS data, light up on the screen. Guess which restaurants didn't get selected? The other four hundred and ninety. Starting to get the picture?
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