cnes activities on semantic search
DESCRIPTION
CEOS WGISS 35 - Sao Jose dos Campos, Brazil - 2013.05.07 Overview of CNES activities on semantic searchTRANSCRIPT
Jérôme Gasperi
CNES activities on semantic search
CEOS WGISS-35INPE - Sao Paulo dos Campos, Brazil - May 7th, 2013
Semantic searchLinked Data
Faceted search
Semantic searchHelp users to find the right data
AMMA CYCLOPES GEOLAND
GLOBCOVER PARASOL POLDER
....
AMMA CYCLOPES GEOLAND
GLOBCOVER PARASOL POLDER
....
Land coverSoil moistureTemperatureReflectance Vegetation
...
How ?
Tag metadata at the product level with keywords related to the project or mission namee.g. search for "Land cover" products instead of "GLOBCOVER"
Use Exogeneous data to characterize product content.The product footprint should be use for automatic processing - e.g. toponyms extraction with OpenStreetMap
ExampleUsing Global Land Cover 2000 to automatically characterize product thematic content
Global Land Cover (GLC 2000)
Thematic sliders
SPOT cover - 1,300,000 scenes
Search for coastal cultivated area ?
Search results(footprints displayed in black over the map)
Coastal cultivated area
Thematic classificationis displayed within
the result metadata
costal...
...cultivated area
Linked dataAchieve multidisciplinary interoperability
« Linked data is the right way to do Semantic Web »Tim Berners-Lee
The Graph of Idea - www.griffsgraphs.com
Faceted searchBreak the hierarchy of search filters
Web search paradigms
Taxonomy search(e.g. Yahoo! Directory)
Direct search(e.g. google)vs.
Faceted search
Taxonomy search(e.g. Yahoo! Directory)
Direct search(e.g. google)+
(a sort of)
« Faceted search enables users to navigate a multi-dimensional information space by combining text search with a progressive narrowing of choices in each dimension »
http://en.wikipedia.org/wiki/Faceted_search
Classification to be ordered in multiple ways
