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google-mapsgoogle-places-api
Dany Joumaa
Dany Joumaa

Reputation: 2040

Calculations involving bus routes

I am working with a college to develop their campus iOS app. One of the app's features is the ability to determine which of the campus bus routes are most applicable to getting to a destination (as well as a listing of when the bus arrives, etc).

If I have sets of long/lat data representing the stops of a route, what is the easiest way to determine the closest route to a long/lat destination point? I have over 10 roues to consider.

Upvotes: 2

Views: 1560

Answers (1)

Sean Mickey
Sean Mickey

Reputation: 7716

If you want to determine the closest point to a route, you can use the Distance to a Ray or Segment formula using a lat-lng as the reference point.

There is another option, if you are using a Google Map, because the Terms of Service require that the service be used in the context of a Google Map; you may want to consider the Google Maps Distance Matrix Servicedev-guide. The service allows you to submit a request with an origins property, which must be an array of google.maps.LatLng starting points and a destinations property, which must be an array of google.maps.LatLng ending points. The DistanceMatrixServiceapi-doc also allows you to define a TravelModeapi-doc, which may be one of: BICYCLING, DRIVING, or WALKING. It has the advantage over simple distance calculation, because it accounts for the natural activity of traveling from one point to another using the existing network of streets.

Upvotes: 2

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