A map can show you where you are or how to get from here to there. But in a world of location aware devices maps can do so much more. Maps and location-based features are the foundation for many apps and provide a rich contextual experience that transforms based on your environment. Open source location services and map frameworks can give you greater transparency, flexibility, compatibility, and control when building location-based apps. This talk will explore how to implement maps and other location-aware features on Android using open source and open data.

1. Building Location-Aware Apps
with Open Source & Open Data
Chuck Greb | 9·21·2014 | Droidcon NYC

2. start where you are

10. start where you are

11. Building Location-Aware Apps
with Open Source & Open Data

12. Building Location-Aware Apps
with Open Source & Open Data

13. 3 kinds of location-aware apps
⇢ Map applications
⇢ Location based apps
⇢ Apps with location aware features
Location-Aware Apps

23. Building Location-Aware Apps
with Open Source & Open Data

24. Philosophy
Open Source

25. Code
Open Source

26. License
Open Source

27. Community
Open Source

28. Advantages
⇢ Transparency
⇢ Flexibility
⇢ Compatibility
⇢ Free!
Open Source

29. Open source is not free like beer
Open Source

30. Open source is free like a puppy
Open Source

31. Building Location-Aware Apps
with Open Source & Open Data

32. Availability & Access
Open Data

33. Reuse & Redistribution
Open Data

34. Universal participation
Open Data

35. Open Knowledge Foundation
https://okfn.org/
Open Data

36. Building Location-Aware Apps
with Open Source & Open Data

37. Components
Open Location Applications

38. Datasource
Open Location Applications

39. Vector Tiles
Open Location Applications

40. Renderer
Open Location Applications

41. Location Services
Open Location Applications
GPS, Network, Sensors, BLE

42. Geocoder
Open Location Applications

43. Search Engine
Open Location Applications

44. Route Engine
Open Location Applications

45. OpenStreetMap (OSM)

46. ⇢ Crowdsourced Data
⬝ Local knowledge
⬝ Community driven
⇢ Public Data
⬝ 2007 TIGER import
⬝ Manual import process
⇢ Open Data Commons Open Database License (ODbL)
⬝ Attribution
⬝ Share-Alike
⬝ Keep Open
OpenStreetMap (OSM)

48. osmdroid

49. 2008
osmdroid

50. Based on Google Maps API v1
osmdroid

51. Support for online and offline tile source
osmdroid

52. Icons, tracking, and shapes
osmdroid

54. Mapbox

55. Fork of osmdroid
Mapbox

56. Easy integration with Mapbox tile server
Mapbox

57. <com.mapbox.mapboxsdk.views.MapView
android:id="@+id/mapview"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
mapbox:mapid="Your Mapbox mapid" />
Mapbox

58. MapView mapView = new MapView(this, "Your Mapbox mapid");
this.setContentView(mapView);
Mapbox

59. (Alternate tile servers also supported)
Mapbox

60. Custom styles & satellite imagery
Mapbox

62. OpenScienceMap

63. Universität Bremen
OpenScienceMap

64. “OpenScienceMap provides free and open maps for Android
with the fastest and 100% pure vector maps around.”
OpenScienceMap

65. <org.oscim.android.MapView
android:id="@+id/map"
android:layout_width="match_parent"
android:layout_height="match_parent" />
OpenScienceMap

66. public class MyActivity extends MapActivity {
...
public Map getMap() {
return super.map();
}
}
OpenScienceMap

67. @Override public void onCreate(Bundle icicle) {
super.onCreate(icicle);
UrlTileSource tileSource = new OSciMap4TileSource("http://vector.example.com/all");
VectorTileLayer baseLayer = getMap().setBaseMap(tileSource);
getMap().layers().add(new BuildingLayer(getMap(), baseLayer));
getMap().layers().add(new PoiLayer(getMap(), baseLayer));
getMap().layers().add(new LabelLayer(getMap(), baseLayer));
baseLayer.setRenderTheme(ThemeLoader.load(
AssetAdapter.g.openFileAsStream("styles/map.xml)")));
}
OpenScienceMap

69. Mapzen

70. Pelias
Mapzen

71. getPelias().suggest("Empire State Build", Callback<Result>);
getPelias().search("Empire State Building", "x1,y1,x2,y2", Callback<Result>);
Mapzen (Pelias)

72. On the Road
Mapzen
OSRM

73. Router.getRouter().setEndpoint("http://osrm.example.com")
.setDriving()
.setLocation(new double[]{lat, lng})
.setLocation(new double[]{lat, lng})
.setCallback(new Callback() {
@Override
public void success(Route route) {
// do stuff
}
@Override
public void failure(int statusCode) {
// do stuff
}
}).fetch();
Mapzen (On the Road)

74. LOSTLocation Open Source TrackerLocation Open Source Tracker
Mapzen

75. LocationClient locationClient = new LocationClient(context,
new LocationClient.ConnectionCallbacks() {
@Override public void onConnected(Bundle bundle) {
onLocationClientConnected();
}
@Override public void onDisconnected() {
onLocationClientDisconnected();
}
});
Mapzen (LOST)

76. private void onLocationClientConnected() {
Location lastLocation = locationClient.getLastLocation();
if (lastLocation != null) {
// do stuff
}
LocationRequest locationRequest = LocationRequest.create();
locationRequest.setInterval(5000);
locationClient.requestLocationUpdates(locationRequest,
new LocationListener() {
@Override public void onLocationChanged(Location location) {
// do more stuff
}
});
}
Mapzen (LOST)

77. Mapzen Android Demo
Mapzen

78. Mapzen Android Demo
Pelias
Android SDK
On the Road LOST
OpenScienceMap
VTM
Speakerbox
TTS
Location
Manager
OSRMPelias
Vector
Datasource
OpenGL ES

84. start where you are

88. Ineke!Chuck Greb | @ecgreb
github.com/mapzen