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Assisted Generation and Publication of Geospatial Metadata
Sergi Trilles; Laura Díaz; José Gil; Joaquín Huerta
Index
● Introduction ● Motivation ● Geoss Service Factory (GSF) ● Architecture ● Experimentation ● Conclusions
Introduction
1 •Starting from geographic
data…
2
• …Web Processing Service to publish data and metadata generated automatically …
3 •… standard and publicly
available.
Motivation
Share Discovery
GSF (Geoss Service Factory) (I)
• Acces • Visualize • Download • Processing
• Share
(Publish)
• Discovery • Access • Decide
• Act
GSF (Geoss Service Factory) (II)
Applications
Workflow Engine Application Logic Service Connector
Services
Discovery View Download Invocation Publication
Geospatial Content
Models Metadata Data
GSF (Geoss Service Factory) (III)
Keywords
Content
WPS
Inte
rfac
e
SPP
Factories
APIs
Existing instances
View
Download
Discovery
MD Generator
Transformation Service
WMS
WFS
WCS
CSW
SOS
WMS
WFS
WCS
CSW
SOS
MD Generator IO Architecture
MD Generator
WMS URL
WFS URL
Keywords
CSW URL
MD Generator Execution Flow
Keywords MD url
SPP
Discovery Link
WPS
Inte
rfac
e
SPP
Factories
APIs
Exixting instances
View
Download
Discovery
MD Generator
Transformation Service
WMS
WFS
WCS
CSW
SOS
WMS
WFS
WCS
CSW
SOS
1
3
3
5
7 6
MD Generator Sequence Diagram user MD Generator CSW-T client Geoserver instance XSLT
Request MDGenerator GetCapabilities request to the WMS service
Generate MD
Connect to CSW-T client
Return MD
Return URL MD
Update MD
Metadata structure
Metadata
language
characterSet
hierarchyLevel
contact
dateStamp
standardVersion
identificationInfo
distribuciónInfo
dataQuality
ISO 19139
Language Coding Hierarchical level of the referred data set Responsible info Date of creation Standard used About the data: name, date, summary … URL services Information relating to the standard
Experimentation (I)
Experimentation (II)
Experimentation (III)
● Time cost 18 seconds (Intel(R) Xeon(R) CPU 5160 @ 3.00GHz, RAM Memory 16 GB DDR2 FB-DIMM Synchronous 667 MHz)
Conclusions
We close the life-cycle of geospatial information with the publication step.
Simple process to publish data and metadata
Improving search and access to information since the metadata is linked to the data
Thanks for your attention
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