I’m keen to understand how a SatNav works out how to get me from A to B.
I understand at a basic level how it receives a number of GPS signals so can work out where it is. I’d like to know what it then does to navigate me through all the different road systems to get me to my destination.
In: Technology
Satnav data usually has two components…. the graphics or drawing coordinates… this is what appears on the screen.
There’s also underlying graph data that just consists of a bunch of nodes and segments…. there are computer science pathfinding algorithms that can find shortest/quickest routes. In some cars, this graph can be updated with live traffic info from SiriusXM or cellular data to improve the algorithm. The GPS signal is just a one-way signal from the satellites.
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