Ist africa2012 solution supporting building of global earth observation systems_1

Session 9f, 11 May 2012 IST-Africa 2012 Copyright 2012 CCSS

Solution Supporting Building of Global Earth Observation Systems of Systems Building (GEOSS)

Premysl Vohnout

Czech Centre for Science and Society

Czech Republic


Introduction

• The Global Earth Observation System of Systems (GEOSS) has been built by the Group on Earth Observations (GEO).

• The GEOSS is focused on user needs and support better

utilisation of enviromental data and decision-support tools by users

• EnviroGRIDS @ Black Sea Catchment aims at – building capacities in the Black Sea region,– to use new international standards to gather, store, distribute,

analyze, visualize and disseminate crucial information on past, present and future states of this region, in order to assess its sustainability and vulnerability.


Introduction

• To achieve its objectives, EnviroGRIDS is building modern Spatial Data Infrastructure (SDI) that will become one component in GEOSS, compatible with the new EU directive on Infrastructure for Spatial Information in the European Union (INSPIRE).

• EnviroGRIDS GeoPortal is designed as „virtual database“.– It uses principles of Uniform Resource Management System (URM)

and Geoportal4everybody– It integrates different technologies like Geographic Information

System (GIS), multimedia, Content Management System, social media.


Objectives

• The main objectives of the implementation of GeoPortal cover the implementation of following services:

• Discovery services: supporting discovery of data, evaluation and use of spatial data and services through their metadata properties.

• View services: as a minimum, display, navigate, zoom in/out, pan, or overlay spatial data and display legend information and any relevant content of metadata

• Download services: enabling copies of complete spatial data sets or parts of such sets to be downloaded

• Transformation services: enabling spatial data to be transformed (projection and harmonization)


Objectives

• Invoke spatial data services: enabling data services to be invoked.

• This implementation is done using Open Geospatial Consortium (OGC) services– Web Map Service (WMS),– Web Feature Services (WFS),– Web Coverage Services (WCS), – Web Processing Services (WPS), – Catalogue Services for Web (CSW)

• All of this services will be made also interoperable with Grid services


Methodology

• EG portal can be seen from two sides:– As a client accessing external services.– As a server making data and services available for other components of

SDI (INSPIRE and GEOSS based) or for GRID service.

• EG portal supports easy registration of different spatial services (here is client). The system offers possibilities to:– Register services temporally for visualisation– Register services to catalogue– Connect temporally other catalogue into discovery client of GeoPortal– Register catalogoue services fo harvesting

• EG portal provides tools for users to create services (here is server)


Technology description






Developments

• The enviroGrids GeoPortal is divided into four basic buildings blocks, which are currently implemented:

• Metadata management (editing, discovery, access, harvesting)

• Data management (upload, download, import to DB, OGC service publishing)

• Data visualization (local data, WMS, WFS, KML and management of WMC)

• Content management (publishing of context and connection with social networks)

Premysl Vohnout

Tady je zatim zalozni text protoze to jede vsechno moc pomalu pokusim se tam dat ten workflow s geossem ale nevim jestli zmaknu udelat screenshoty ...


Results

• EG portal ensures that any user can easily discover, evaluate and use any type of information.

• Core component of the system is metadata management system– It allows to manage any types of information.– It allows to search and share data using catalogue service and

social networks.

• Tools which are mainly used also in other portals are:– MIcKA– HSLayers– Mapserver or Geoserver


Results

• EG portal provides:– Discovery service

• Writing and publishing INSPIRE-compliant metadata– View service

• Publishing data using INSPIRE-compliant view service (WMS 1.3.0)

– Download service• This is most problematic part. But portal provides reliable

solution. Problems are performance and interoperability.


Conclusion and outlook

• EG portal is now part of of GEOSS infrastructure.• Solution supports both major SDI iniatives INSPIRE as well

as GEOSS.• It can be now used as tool for capacity building in region.• Curently it offers:

– List of basic services to integrate data in any region.– Harvesting of available data and services– Integrated access point for data in region

• This experiences can be transferred to other regions including Africa


Conclusion and outlook

• Basic infrastructure is prepared for– management of metadata and data– publishing and accessing services

• In final phases of development was done heavy tests of services related to GEOSS and EnviroGRIDS– We discovered a lot of interoperability problems. This is mainly

problem of version of services.– It is necessary to cooperate with services providers to fix problems.– Biggest problems are with new WFS versions, WCS and CSW

services.

• There is generally needed more work on newer standards to provide advanced clients for WPS and SOS