TomTom navigational device’s have Global Positioning System(GPS) hardware and software that is used to gather information regarding roads, highways and streets in your country. Once the GPS device determines your current location, it pinpoints where you want to go and the best way to get there. Maps are downloaded onto your computer and then transferred to your TomTom while the device is linked to your computer. Proper set up of your computer system and Internet connection is needed to download maps properly. Follow these steps to install TomTom maps.