With the open source Geo2tag platform, developers can use JSON or XML to manage location references in apps for Nokia X and Nokia Asha phones. In this webinar, we’ll show how to use the Geo2tag API and how to manage a local database of georeferences. We’ll begin the training by introducing the fundamentals of Location Based Services and the REST API of Geo2Tag LBS Platform (www.geo2tag.org). We’ll focus on networking, JSON and web services. Then we will demonstrate several applications developed on top of Geo2Tagand share the newest enhancements to the platform. We’ll end the training with a discussion of integrating Geo2Tag and third-party map widgets.

1. LBS for Nokia X and
Asha using Geo2tag
Kirill Krinkin
FRUCT
kirill.krinkin@fruct.org

2. What is Geo2Tag
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Geo-tagging (geo-coding) platform
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High performance database for spacial/temporal tag filtration
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RESTful service
Geo2Tag does not provide:
– map services
– data back-end (in current version)

3. Geo2Tag sites

4. Geo2Tag terminology
Tag: tuple <t, L, B, H, data>,
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t – time
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Coordinates (elliptic)
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b: latitude
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l: longitude
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h: altitude
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data – text data ~1K
Channel: classifier for group of tags

5. Geo2Tag: channels and tags
LBS Platform
Канал
Channel
Channel
Channel
Channel
Tag
- time
- coordinates
- data (link)
Filtration
- time
- radius
- figure (2D or 3D)
Tag
Tag
Tag

6. Geo2Tag architecture
Queryengine
Session manager
HP
database
BLOBs
cache
Indexer
Cluster/cloud
infrastructure
backend *)
clients
Libraries:
jgeo, http_reqs
Session cache
web
Asha
web
Qt-based
Android
JSON
System cache
*) alpha version is available

7. Geo2Tag LBS Platform installation

8. Geo2Tag preparation
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Install your own server http://download.geo2tag.org
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or use free test instance:
– Ask for creating service geo2tag-info@osll.ru
– Register users http://194.85.173.9:20005/register.php?
db_name=dbname

9. Getting HERE keys

10. com.nokia.maps.map.MapCanvas
This class offers an abstract base class for providing a method
of showing map content on a Canvas

11. Obtaining coordinates

12. Example layout
Map widget implementation
Implementation of Geo2Tag requests
Getting coordinates on device

13. Libraries
Nokia HERE (./plugins/maps_api/lib)
– qmaps-core.jar
– maps-components.jar – Infobubles, Touchable buttons and so on
– maps-gesture.jar – Add Gesture API support
– maps-kml.jar – JSR#172 is required for KLM data
– places.jar – Geocoding and reverse geocoding
– routing.jar – Routing services
Geo2Tag For Asha:
– j2megeo.jar (sources: https://github.com/geo2tag/jgeo2me)

14. Map widget
Basic map widget
Supports gestures

15. Authentication

16. InfoBubble

17. FocalObserver and centering

18. Centering and add commands

19. ClearMap command

20. Show nearest tags

21. Geo2Tag requests
doLoginRequest
doSetDbRequest
doFilterCircleRequest
doWriteTag

22. .doLoginRequest

23. .doSetDbRequest

24. .doFilterCircleRequest

25. .doWriteTagRequest

26. Your application’s target audience
is on the move, not in a comfy
chair.
© Nokia 2012 S40TT_webinar_ux_location.pptx v. 0.1 2012-05-02 Jan Krebber

27. Your application will be used with
thumbs only.
© Nokia 2012 S40TT_webinar_ux_location.pptx v. 0.1 2012-05-02 Jan Krebber

28. Allow privacy.
© Nokia 2012 S40TT_webinar_ux_location.pptx v. 0.1 2012-05-02 Jan Krebber

29. Consider lists instead of maps.
© Nokia 2012 S40TT_webinar_ux_location.pptx v. 0.1 2012-05-02 Jan Krebber
1 2 3

30. Merge items on a map instead of
stacking them.
© Nokia 2012 S40TT_webinar_ux_location.pptx v. 0.1 2012-05-02 Jan Krebber
1 2 3 4

31. Use a map thumbnail in a view
that contains non-map items.
© Nokia 2012 S40TT_webinar_ux_location.pptx v. 0.1 2012-05-02 Jan Krebber
1 2

32. Resources
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Example: https://github.com/geo2tag/asha-map-example
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Map Forms in JavaME http://alturl.com/t99du
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Determining Current Location via Cell ID http://alturl.com/3pvxn
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Geo2Tag development resources:
– https://github.com/geo2tag
– http://geo2tag.atlassian.net/
– http://download.geo2tag.org/

33. Thank you.
Questions?
For more information:
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http://geo2tag.org
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http://fruct.org