1. The document describes a semantic network dictionary system for integrating data from various global observation domains like meteorology, agriculture, and remote sensing. 2. The system collects and manages ontological information like terms and definitions from different subject dictionaries and databases. 3. It allows users to browse, visualize relationships between terms, and modify semantic information through an interface connecting various wikis and semantic networks.

1. Implementation of Semantic Network Dictionary System for Global Observation Data Shigenobu TACHIZUKA , Masahiko NAGAI, Ryosuke SHIBASAKI Center of Spatial Information Science the Univ. of Tokyo, JAPAN

2. Distribution of abnormal weather, March 2002 average temperature(℃) Malnutrition Population China 21% India 25% Other Asia 20% Africa 23% South America 7% Middle and near East 4% abnormal weather, climate change, flood damages, water or food crisis Poverty, Health, Safety  An understanding and prediction of an earth system

5. Abnormal Weather / Climate Change / Wind & Flood Damage / Food & Water Crisis -> Poverty ， Health ， Safety Understanding and Prediction of Earth system Create new Knowledge for Earth System Science For Social Needs Numerical prediction Flood prediction Cooperation with international Organizations Cooperation with international Organizations Metrological information Integrated use of data Agriculture management Dispersed use Prediction needs Integrated Information Centralized Data Integration & Fusion 1. data archive, storage, integration 2. data assimilation, visualization, mining 3. design for database schema 4. data collection and distribution 5. sensor data fusion Integration of Distributive Data 1. constriction of ontology registry 2. service by ontology registry 3. distinguished DB for agriculture 4. distinguished DB for satellite data Core System data Integrated Information Oceanic data Flood data Earth observation data Collection/quality management Cooperation with International Research Center Satellite data Ground observation data Cooperation with Earth Observation Plans Integration method Global Environmental Data Integration Project

6. 気象用語 biology term Landuse Classification schema Climatology Health Science Agriculture term Hydrology term 农业 เกษตรกรรม 농업 It is necessary to look over many fields and we have to understand many technical terms DB DB DB DB DB DB DB DB DB DB DB DB

8. Framework for Semantic Network Dictionary Semantic Network Dictionary future work Created dictionary is registered to the system again. Clarifying ontological expression Visualizing relationship between terms  Providing reference information to users (2) Browse Modification of registered information on the system  newest information (3) Modification Collection and registration the semantics (1) Registration (4) Utilization Support of technical term Data Integration Constriction of data model Providing integrated information Utilizing as knowledge Information retrieval

12. Data collection from existing dictionaries Geography Ecology Health Agriculture Remote Sensing Earth Science Hydrology Environment

13. Digitize from paper dictionaries Input to MediaWiki

14. Framework for Semantic Network Dictionary Semantic Network Dictionary Created dictionary is registered to the system again. Clarifying ontological expression Visualizing relationship between terms  Providing reference information to users (2) Browse Modification of registered information on the system  newest information (3) Modification Collection and registration semantics (1) Registration (4) Utilization Assist of Technical term Data Integration Constriction of data model Providing integrated information Utilizing as knowledge Information retrieval

15. Browsing by MediaWiki

16. Browsing of Semantic Network Dictionary System Link to MediaWiki Description Link to MediaWiki Editing page Link to another term information Get from each MediaWiki site via http Get semantic network from rdf statement (using Sesame)

17. Visualization of Semantic Network Users visualize the semantic information provided by the system.

18. Framework for Semantic Network Dictionary Semantic Network Dictionary Created dictionary is registered to the system again. Clarifying ontological expression Visualizing relationship between terms  Providing reference information to users (2) Browse Modification of registered information on the system  newest information (3) Modification Collection and registration semantics (1) Registration (4) Utilization Assist of Technical term Data Integration Constriction of data model Providing integrated information Utilizing as knowledge Information retrieval

19. Modification by using MediaWiki Users modify the semantic information by using MediaWiki.  We have not needed to develop the management function of editing history .

22. Thank you for your attention. Shigenobu TACHIZUKA , Masahiko NAGAI, Ryosuke SHIBASAKI Center of Spatial Information Science the Univ. of Tokyo, JAPAN [email_address]