Ruby on Rails

No method is perfect – GPS needs clear sky, aGPS improves this but still needs some satellites to be seen, GSM works like a charm if you have lots of antennas but falls dramatically if you’re in a remote place and WiFi positioning is good in cities, but absolutely lacks in remote zones. Only the composition of all can cover all the situations encountered in a normal life – crowded city when going to work and big, empty spaces when going to mountains to relax.

GPS vs aGPS vs WiFi vs GSM localization

GPS is the oldest one from the frameworks available to the large audience. It isn't the first positioning system, but it is the one with the most success and longevity. It started as a military project in 1957. Because of the cold war, once the Russians sent to space the first man-made satellite, a team of scientists started monitoring its radio transmissions. The crucial discovery was that, because of the Doppler Effect, the signal transmitted frequency increases as the satellite approached, and lowers as it continued moved away from them.

GPS – Global positioning system

The software as industry relies more on reusability and on site modifications. If a programmer finds a piece of code, of course respecting the intellectual property, can easily adapt it to his project. This approach is called adaptive, because these methods focus on adapting quickly to changing realities – no customer knows from the start exactly what he needs from the start.

Agile vs Waterfall