This document provides an overview of Geo2Tag, a geo-tagging and location-based services platform. It describes Geo2Tag's architecture and components, how to install a Geo2Tag server, and how to integrate it into a Nokia Asha device application to provide tagging and location filtering capabilities. Examples are provided of Map widget implementation, authentication, displaying information bubbles, and making Geo2Tag API requests to perform actions like user login, database setting, location filtering, and writing tags. Resources for further development are also listed.

1. Nokia Asha LBS
Development with
Geo2Tag
Kirill Krinkin
FRUCT
kirill.krinkin@fruct.org
@kkvt

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

3. Geo2Tag terminology
Tag: tuple <t, L, B, H, data>,
●
t – time
●
B,L,H – coordinates
●
data – text data ~1K
Channel: classifier for group of tags

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

5. Geo2Tag architecture
clients
Asha
web
Qt-based
Android
Libraries:
jgeo, http_reqs
JSON
Query engine
Session cache
cache
System cache
Session manager
HP
database
Indexer
backend
Cluster/cloud
infrastructure
BLOBs

6. Geo2Tag LBS Platform installation
http://download.geo2tag.org/

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

8. Getting HERE keys

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

10. Obtaining coordinates

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

12. Libraries
Nokia HERE (./plugins/maps_api/lib)
–
maps-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)

13. Map widget
Basic map widget
Supports gestures

14. Authentication

15. InfoBubble

16. FocalObserver and centering

17. Centering and add commands

18. ClearMap command

19. Show nearest tags

20. Geo2Tag requests
doLoginRequest
doSetDbRequest
doFilterCircleRequest
doWriteTag

21. .doLoginRequest

22. .doSetDbRequest

23. .doFilterCircleRequest

24. .doWriteTagRequest

25. 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/

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