1. Ontology / Terminology
Sergio D’Elia - EOP-GR Service Support and Ground Segment Technology
March 4, 2009 – Slide 1

2. Ontology / Terminology Objectives
Permit easy identification from non-EO domains (terms) of relevant EO
Products / services
Processing components
Ontology
As simple as possible
Supporting multiple domains
With limited dependencies from evolution / changes
Possibly permitting multi-lingual support (not ESA priority)
March 4, 2009 – Slide 2

3. None focused on EO applications (see also InterRisk)
2005 Assessment
GEMET (General Multilingual Environmental Thesaurus)
Groups / Themes, 21 languages
EARTh (Environmental Applications Reference Thesaurus)
GEMET for Italy (English – Italian version)
Wiktionary (~ Wikipedia)
Multilingual dictionary with definitions, etymologies,…
Eurovoc Thesaurus
On EC fields, 21 languages
SWEET (Semantic Web for Earth and Environmental Terminology)
Earth science data / information
None focused on EO applications (see also InterRisk)
March 4, 2009 – Slide 3

4. Minimum EO Ontology Application Term
Product = Packed data or information
Product
Service
Processor
Unstable: many changes possible below “Application Term”
March 4, 2009 – Slide 4

5. Separation to Improve Stability
Application Term
Multi-domain Thesaurus
(shared, stable, multi-lingual)
Semantic links
System Specific Taxonomy
(dynamic, selected language)
Application Term
Product
Service
Processor
March 4, 2009 – Slide 5

6. Multi-domain Thesaurus
Application Terms
themes
domains
information
measures
can be related to
health
environment
climate
wave period
wave height
water quality
water turbidity
waves
marine environment
water transparency
Secchi depth
terrestrial environment
deterioration of environment
marine deterioration
alga bloom
alga bloom monitoring
alga bloom location / extent
alga bloom map
oil pollution
oil spill monitoring
oil spill drift forecast
oil spill surveillance
natural environment
Multi-domain Thesaurus
March 4, 2009 – Slide 6

7. Multi-domain Vocabulary
Term Type
Term
Application Domain
Description
Synonyms
Related terms
Application
alga bloom
marine deterioration
An alga bloom is a rapid increase in the population …
harmful alga bloom, marine bloom, water bloom, …
eutrophication, …
marine environment “ …
March 4, 2009 – Slide 7

8. Multi-domain Thesaurus
Graphic Search
Multi-domain Thesaurus
Ontosphere3D
Protégé
March 4, 2009 – Slide 8

9. Textual Search alga bloom harmful Multi-domain Thesaurus Definitions
Multi-domain Vocabulary
Definitions
Multi-domain Thesaurus
harmful
alga bloom
March 4, 2009 – Slide 9

10. GSCDA Shared and Specific Semantics
Multi-domain Thesaurus
Application
Term
Product Type
Sensor
Mission
GSCDA Taxonomy
Dataset
Definitions
GSCDA
Vocabulary
harmful
GSCDA Semantic
Search Tool
Search path
Multi-domain Vocabulary
March 4, 2009 – Slide 10

11. GSCDA Semantic Search Tool (http://esaotewiki. epistematica
Link to 2D/3D Navigator
Multi-domain
Thesaurus and Vocabulary
Taxonomy and Vocabulary
GSCDA
March 4, 2009 – Slide 11

12. 2D Navigator
March 4, 2009 – Slide 12

13. 2D Navigator
March 4, 2009 – Slide 13

14. Shared / GSCDA Implementation
Master Version
Online Version
Firewall
WS IF
Multi-domain Thesaurus
Multi-domain Vocabulary
WS IF
Editing
Use
WS IF
CSGDA Taxonomy
CSGDA Vocabulary
WS IF
= OWL (reasoning)
= Excel
Download FTP Site
March 4, 2009 – Slide 14

15. Future GSCDA Implementation
Application
Term
Product Type
Sensor
Mission
Dataset
CSGDA Taxonomy
Application
Term
Product Type
Sensor
Mission
Dataset
Requirements
Product
Characteristics
CSGDA Vocabulary
Reasoning
= OWL (reasoning)
= Excel
March 4, 2009 – Slide 15

16. Ontology / Terminology - Shared / Specific
Format
has
KEO Taxonomy
generatedBy
Application
Term
pertainsTo
(0..*)
Processing
Category
(1..*)
Product
Type
hasInput
hasOutput
Feature
Label
Processor
basedOn
SSE Taxonomy
Application
Term
pertainsTo
(0..*)
Service
Category
Vocabulary
Thesaurus
Application
Term
Multi domain
Product
Type
Sensor
Mission
EO only
(1..*)
Dataset
Application
Term
GSCDA Taxonomy
Service
Category
Format
Processing
Category
Dataset
Product
Type
Sensor
Mission
Shared
March 4, 2009 – Slide 16

17. Processing Categories
KEO Taxomony
Processing Categories
Processor Name
Calibration
AVNIR-2 radiometric calibration v0.0 CLI
Classification - fusion
PALSAR, Landsat, TM5 classification v0.0 FEP
Classification - NN
Landsat TM7 spectral classification v0.0 FEP
Classification - SAR
SRTM SAR classification v0.0 FEP
Classification - Soil Mapper
IKONOS spectral pre-classification v0.0 FEP
Clipping
GeoTiff image cropping v0.0 CLI
Conversion
Format conversion v0.0 CLI
Feature extraction
AVNIR-2 cloud mask v0.0 FEP
Function - boolean
Boolean array
Function - logic
And v0.0 CLI
Function - string
Char at value v0.0 JAVA
Function -arithmetic
Identity v0.0 WS
Function -file
Can read v0.0 CLI
Segmentation
GeoTiff image segmentation v0.0 FEP
Texture analysis
KIM texture parameters extraction v0.0 CLI
Utility
MERIS band extractor v0.0 CLI
March 4, 2009 – Slide 17

18. Shared and Specific Semantics
Multi-domain Thesaurus
Marine Core Service
Application
Terms
Service Support Environment
Application
Terms
Processing Environment
Application
Terms
Definitions
Sensor Network
Application
Terms
Search starts from within each system
Multi-domain Vocabulary
March 4, 2009 – Slide 18

19. Possible Future Multi-domain Thesaurus Marine Core Service
Application
Terms
Service Support Environment
Application
Terms
Processing Environment
Application
Terms
Registry + Access
Definitions
Sensor Network
Application
Terms
Multi-domain Vocabulary
(GEO Ontology Registry)
March 4, 2009 – Slide 19