1. Web Symbol Service
Prototype implementation for remote access of symbologies
Google Summer of Code
Cristian Martín Reinhold. Diciembre 2009
christian.reinhold@gmail.com

2. Contents
• Introduction
• Symbols Server
• Client-Server Dialogue (WSS)
• Symbology client for gvSIG
2

3. Introduction

4. The project
• In collaboration of
- Jaume I University
- Prodevelop
• Funded by
- Google (SoC 2009)
4

5. The project
• In collaboration of
- Jaume I University
- Prodevelop
• Funded by
- Google (SoC 2009)
4

6. The project
• In collaboration of
- Jaume I University
- Prodevelop
• Funded by
- Google (SoC 2009)
4

7. The project
• In collaboration of
- Jaume I University
- Prodevelop
• Funded by
- Google (SoC 2009)
4

8. Objetives
5

9. Objetives
• Remote symbols access
5

10. Objetives
• Remote symbols access
• Provide a catalogue of symbols
5

11. Objetives
• Remote symbols access
• Provide a catalogue of symbols
• Offer a dialogue between client
and server
- Client: asks for a service
- Servidor: offers symbols
5

12. Symbols server

13. Some notes
• Python 2.5 >> 2.6
• Django and Pinax as CMS
Django
7

14. Some notes
• Python 2.5 >> 2.6
• Django and Pinax as CMS
Pinax
Django
7

15. Some notes
• Python 2.5 >> 2.6
• Django and Pinax as CMS
Pinax
Django
7

16. Objetives
8

17. Objetives
✓ Allows
- Simple symbologies’ upload
- Validation of simbologies and compulsory fields
- Tags queries
8

18. Objetives
✓ Allows
- Simple symbologies’ upload
- Validation of simbologies and compulsory fields
- Tags queries
✗ Not allowed
- Legend uploads
- Edit and delete symbols
8

19. Demo
9

20. Demo
9

21. Previous validation
10

22. Previous validation
• Verification of
- Online Resources
- Validation against a .xsd file
10

23. Previous validation
• Verification of
- Online Resources
- Validation against a .xsd file
• Once uploaded
- Online Resource path modification
- External WMS query for snapshot image
10

24. WSS dialogue

25. WSS Server
• Dialogue?
- Restlet Structure
• Input?
- URL query
• Output?
- Error messages and info (xml)
- Simbology file (.sld)
(+ embedded image)
12

26. Restlet Structure
• Separation of terms by “/”
• Terms used:
- Type
- Categ
- Tags
- Filtering
- Output
13

27. Restlet Structure
• Separation of terms by “/”
• Terms used:
- Type {point, line, polygon, raster}
- Categ
- Tags
- Filtering
- Output
13

28. Restlet Structure
• Separation of terms by “/”
• Terms used:
- Type {point, line, polygon, raster}
- Categ {0: Agriculture, 1: Biodiversity, …}
- Tags
- Filtering
- Output
13

29. Restlet Structure
• Separation of terms by “/”
• Terms used:
- Type {point, line, polygon, raster}
- Categ {0: Agriculture, 1: Biodiversity, …}
- Tags {tag1, tag2, tag3, …, tagN}
- Filtering
- Output
13

30. Restlet Structure
• Separation of terms by “/”
• Terms used:
- Type {point, line, polygon, raster}
- Categ {0: Agriculture, 1: Biodiversity, …}
- Tags {tag1, tag2, tag3, …, tagN}
- Filtering {all, <pag_ini>+<group_by>}
- Output
13

31. Restlet Structure
• Separation of terms by “/”
• Terms used:
- Type {point, line, polygon, raster}
- Categ {0: Agriculture, 1: Biodiversity, …}
- Tags {tag1, tag2, tag3, …, tagN}
- Filtering {all, <pag_ini>+<group_by>}
- Output {.res, .sld, .xml}
13

32. Example 1
14

33. Example 1
• Results (.res) by categories
14

34. Example 1
• Results (.res) by categories
- How many point symbols are there for each
category?
14

35. Example 1
• Results (.res) by categories
- How many point symbols are there for each
category?
<host>/symbols/points/any/all.res
14

36. Example 1
• Results (.res) by categories
- How many point symbols are there for each
category?
<host>/symbols/points/any/all.res
- ¿How many polygon symbols are there for each
category that also has both tags “lake” and “Spain”?
14

37. Example 1
• Results (.res) by categories
- How many point symbols are there for each
category?
<host>/symbols/points/any/all.res
- ¿How many polygon symbols are there for each
category that also has both tags “lake” and “Spain”?
<host>/symbols/polygons/lake+Spain/all.res
14

38. Example 2
15

39. Example 2
• Symbols metadata (.xml)
15

40. Example 2
• Symbols metadata (.xml)
- List the all metadata (id, tags, titulo, ...)
symbols of page 2, grouped 8 by 8, where
their category is “3:Agriculture” and its tag
“corn”.
15

41. Example 2
• Symbols metadata (.xml)
- List the all metadata (id, tags, titulo, ...)
symbols of page 2, grouped 8 by 8, where
their category is “3:Agriculture” and its tag
“corn”.
<host>/symbols/points/3/corn/2+8.xml
15

42. Symbology client

43. WSS client
• gvSIG extension of the symbols
library
• It allows:
- Local and remote symbol query
- Local and remote symbol loading and safe
them locally
17

44. Lacks
• Not allowed
- Online Resources from WSS server not
parsed properly
18

45. Demo
19

46. Demo
19

47. Future
20

48. Future
• Encourage organisms and
enterprises to use WSS for
publishing their own symbols
20

49. Future
• Encourage organisms and
enterprises to use WSS for
publishing their own symbols
• Develop of a complete
specification
20

50. Future
• Encourage organisms and
enterprises to use WSS for
publishing their own symbols
• Develop of a complete
specification
• Extend the WSS protocol
20

51. Future
• Encourage organisms and
enterprises to use WSS for
publishing their own symbols
• Develop of a complete
specification
• Extend the WSS protocol
• Better usability
20

52. Questions
?
Cristian Martín Reinhold. Diciembre 2009
christian.reinhold@gmail.com
http://confluence.prodevelop.es/display/WSS/Home