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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