Public Transit stops

_{Estimated reading time: 5 minutes}

This API provides detailed access to public transport data including agencies, routes, stops, and trips. It is designed to integrate with interactive map-based applications using the Magic Lane SDK and allows developers to dynamically fetch and explore real-time public transportation information from selected positions on the map.

Key Features

• Query public transport overlays by screen position.
• Retrieve structured information about transport agencies, stops, routes, and trips.
• Support for real-time data including delays and cancellations.
• Metadata about accessibility, bike allowances, and platform details.
• Utilities for filtering trips by route type, route short name, or agency.

How It Works

• Set a position on the map using setCursorScreenPosition.
• Query for public transport overlays with cursorSelectionOverlayItemsByType or for generic overlays with cursorSelectionOverlayItems.
• Retrieve stop information using getPTStopInfo() on each overlay item.
• Use the returned PTStopInfo object to explore agencies, stops, and trips.
• This API is part of a modular system intended to support rich and interactive transit applications.

An example of using this feature is the following:

void _onMapCreated(GemMapController controller) async {
    // Save controller for further usage.
    _mapController = controller;

    _mapController.registerLongPressCallback((pos) async {
        // set cursor position on the screen
        await _mapController.setCursorScreenPosition(pos);

        // get the public transit overlay items at that position
        final items = _mapController
            .cursorSelectionOverlayItemsByType(CommonOverlayId.publicTransport);

        // for each overlay item at that position
        for (final OverlayItem item in items) {
            // get the stop information
            final ptStopInfo = await item.getPTStopInfo();
            if (ptStopInfo != null) {
                // information about agencies
                final agencies = ptStopInfo.agencies;

                // information about stops and generic routes
                // (routes that don't have `heading` set)
                final stops = ptStopInfo.stops;

                // information about trips (together with 
                // route, agency, stop times, real time info, etc.)
                final trips = ptStopInfo.trips;

                // How to use stops
                for (final stop in stops) {
                    print('Stop id: ${stop.stopId}');
                    print('Stop name: ${stop.stopName}');

                    print('Routes:');
                    for (final route in stop.routes) {
                        print('  Route id: ${route.routeId}');
                        print('  Route short name: ${route.routeShortName}');
                        print('  Route long name: ${route.routeLongName}');
                    }
                }
            }
        }
    });
}

You can filter the trips by:

• route short name (tripsByRouteShortName)
• route type(tripsByRouteType)
• agency (tripsByAgency)

These can be accomplished by using the following methods of the PTStopInfo class:

List<PTTrip> tripsByRouteShortName(String name)
List<PTTrip> tripsByRouteType(PTRouteType type)
List<PTTrip> tripsByAgency(PTAgency agency)

An example illustrating this is the following:

final trips = ptStopInfo.tripsByRouteType(PTRouteType.bus);

---

PTAgency

Represents a public transport agency.

Property	Type	Description
id	int	Agency ID
name	String	Agency name
url	String?	Optional website URL

---

PTRouteType

Enum representing route types.

enum PTRouteType {
  bus,
  underground,
  railway,
  tram,
  waterTransport,
  misc
}

---

PTRoute

Represents a public transport route.

Property	Type	Description
routeId	int	Route ID
routeShortName	String?	Short name
routeLongName	String?	Long name
routeType	PTRouteType	Type of route
routeColor	Color?	Color in hex
routeTextColor	Color?	Text color in hex
heading	String?	Optional heading

---

PTStop

Represents a public transport stop.

Property	Type	Description
stopId	int	Stop ID
stopName	String	Stop name
isStation	bool?	Is station or not
routes	List<PTRoute>	Associated routes

---

PTStopTime

Details a stop time in a trip.

Property	Type	Description
stopName	String	Stop name
coordinates	Coordinates	Lat/Lon
hasRealtime	bool	Real-time available
delay	int	Delay in seconds
departureTime	DateTime?	Optional departure time
isBefore	bool	Is before current time
isWheelchairFriendly	bool	Wheelchair accessible

---

PTTrip

Describes a public transport trip.

Property	Type	Description
route	PTRoute	Associated route
agency	PTAgency	Associated agency
tripIndex	int	Trip index
tripDate	DateTime?	Date
departureTime	DateTime?	Departure
hasRealtime	bool	Realtime info
isCancelled	bool?	Cancelled
delayMinutes	int?	Delay
stopTimes	List<PTStopTime>	Times at stops
stopIndex	int	Stop index
stopPlatformCode	String	Platform
isWheelchairAccessible	bool	Wheelchair access
isBikeAllowed	bool	Bike allowed

---

PTStopInfo

Aggregates stop-related data.

Property	Type	Description
agencies	List<PTAgency>	Available agencies
stops	List<PTStop>	Nearby stops
trips	List<PTTrip>	Available trips