How Does GPS Determine the Best Route?

[Likemath2014]

Hi there,

I am not sure if it's the right place to ask the question.
My question is how the GPS chooses the best way.
I mean where I can find something about its idea
Thx

 

[Borek]

Two separate parts to that.

1. GPS finds position using signal from GPS satellites.

2. Built in computer uses built in map to find the shortest path (searching the graph, see for example http://en.wikipedia.org/wiki/Dijkstra's_algorithm).

 

[Likemath2014]

many thanks, my question is the second part

 

[OldEngr63]

Once the two end points are defined, this becomes an Operations Research optimization problem. You may want the shortest path, or you may want the fastest path (based on speed limits for each segment), or some other criterion. Operations Research is a well defined field dealing with such problems.

 

[alphy]

I am happy to provide an explanation on how GPS finds the best way. GPS stands for Global Positioning System, and it is a network of satellites orbiting the Earth that transmit signals to GPS receivers on the ground. These receivers then use the signals to determine the receiver's location, speed, and time.

In order to find the best way, GPS relies on a process called trilateration. This involves using signals from at least three satellites to determine the receiver's position on Earth. By comparing the time it takes for the signals to reach the receiver, the GPS receiver can calculate its distance from each satellite and then use this information to pinpoint its location on a map.

GPS also takes into account factors such as traffic, road closures, and construction to determine the best route. This information is constantly updated through real-time data from sources such as traffic sensors and user reports.

Additionally, GPS systems often have built-in algorithms that consider factors such as distance, time, and traffic to calculate the most efficient route. They also take into account any user preferences, such as avoiding toll roads or highways.

In summary, GPS uses satellite signals and advanced algorithms to determine the best route for a user based on their location and real-time data. I hope this helps answer your question.