Sat Nav - Sat Nav Reviews

Sat Nav allows small electronic receivers to determine their location (longitude, latitude, and altitude) to within a few metres using time signals transmitted along a line-of-sight by radio from satellites. Receivers calculate the precise time as well as position, which can be used as a reference for scientific experiments.
Sat Nav is becoming increasingly feasible in these days and offers several benefits.
Better location search
If you don’t know your destination’s street name or zip code, a sat nav can be practically useless. A web-based solution lets you locate a destination by company name, area, type of business, or any other criteria using natural language.
Instant updates
Details of new routes, road works, accidents, heavy traffic etc. can be updated in real time and relayed to a web application. Some Sat Nav offer this facility but many require subscription fees and the quality of the information is variable.
Data mashups
A web-based sat nav can access information from anywhere on the net. Once your route is calculated, the Sat Nav could offer live videos of road-side cameras, restaurant or hotel offers, sites of interest, etc.
Collaborative routing
Details of every user’s journey can be collated and analyzed. The driver would have access to a huge database of recommended routes, average times, interesting journeys, etc. Rather than selecting the shortest or quickest route, the driver would be able to select the quietest, most popular, best scenery, etc.
Alternative transport
A Sat Nav or satellite navigation system can access information from a variety of transport systems — not just the road. For example, the data might indicate that a route will be especially busy because of holiday traffic, recommend a train service and instantly book a ticket.
Supports existing hardware
many smart phones already offer good web browsers and GPS facilities. There’s no reason why you couldn’t use a net book, tablet or similar hardware rather than a dedicated device.
Multiple input methods
Dedicated sat navs have restricted hardware and software, but a smart phone or PC can support other input and output devices. For example, the web cam or microphone could be utilized to offer gestures or voice control.
Free data
Systems such as Google Maps, Street View and Earth already provide free mapping data which could be used by a web-based sat nav. The systems could also be commercialized by companies paying to play audio or text-based adverts when you approach their premises.
However, the current problem is internet connectivity. Wi-Fi is not universally available and mobile internet connections could be slow or fail when entering a tunnel or built-up area. The obvious solution is offline web technology. Once you’re on the road, the application could cache the full journey details or download essential information within, say, a 10-mile radius.
Both Nokia and Google already offer beta versions of free turn-by-turn navigation systems for mobile operating systems. The news has caused TomTom’s share price to slump in recent weeks, although there’s no reason why TomTom couldn’t capitalize on the technologies.