http://www.cnr.it/ontology/cnr/individuo/prodotto/ID292885
GI-axe: an access broker framework for the geosciences (Abstract/Poster in convegno)
- Type
- Label
- GI-axe: an access broker framework for the geosciences (Abstract/Poster in convegno) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Alternative label
Enrico Boldrini, Stefano Nativi, Mattia Santoro, Fabrizio Papeschi, Paolo Mazzetti (2012)
GI-axe: an access broker framework for the geosciences
in AGU Fall Meeting 2012, San Francisco, United States, 3-7 December 2012
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Enrico Boldrini, Stefano Nativi, Mattia Santoro, Fabrizio Papeschi, Paolo Mazzetti (literal)
- Note
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- ESSI-lab of IIA, CNR, Prato, Italy (literal)
- Titolo
- GI-axe: an access broker framework for the geosciences (literal)
- Abstract
- The efficient and effective discovery of heterogeneous geospatial resources (e.g. data and services) is
currently addressed by implementing \"Discovery Brokering components\"ù\"\"such as GI-cat which is
successfully used by the GEO brokering framework. A related (and subsequent) problem is the access of
discovered resources. As for the discovery case, there exists a clear challenge: the geospatial Community
makes use of heterogeneous access protocols and data models. In fact, different standards (and best
practices) are defined and used by the diverse Geoscience domains and Communities of practice. Besides,
through a client application, Users want to access diverse data to be jointly used in a common Geospatial
Environment (CGE): a geospatial environment characterized by a spatio-temporal CRS (Coordinate
Reference System), resolution, and extension. Users want to define a CGE and get the selected data ready
to be used in such an environment. Finally, they want to download data according to a common encoding
(either binary or textual). Therefore, it is possible to introduce the concept of \"Access Brokering component\"ù
which addresses all these intermediation needs, in a transparent way for both clients (i.e. Users) and access
servers (i.e. Data Providers). This work presents GI-axe: a flexible Access Broker which is capable to
intermediate the different access standards and to get data according to a CGE, previously specified by the
User. In doing that, GI-axe complements the capabilities of the brokered access servers, in keeping with the
brokering principles. Let's consider a sample use case of a User needing to access a global temperature
dataset available online on a THREDDS Data Server and a rainfall dataset accessible through a
WFS\"\"she/he may have obtained the datasets as a search result from a discovery broker. Distribution
information metadata accompanying the temperature dataset further indicate that a given OPeNDAP service
has to be accessed to retrieve it. At this point, the User would be in charge of searching for an existing
OPeNDAP client and retrieve the desired data with the desired CGE; worse he/she may need to write
his/her own OPeNDAP client. While, the User has to utilize a GIS to access the rainfall data and perform all
the necessary transformations to obtain the same CGE. The GI-axe access broker takes this interoperability
burden off the User, by bearing the charge of accessing the available services and performing the needed
adaptations to get both data according to the same CGE. Actually, GI-axe can also expose both the TDS the
WFS as (for example) a WMS, allowing the User to utilize a unique and (perhaps) more familiar client. The
User can this way concentrate on less technological aspects more inherent to his/her scientific field. GI-axe
has been first developed and experimented in the multidisciplinary interoperability framework of the
European Community funded EuroGEOSS project. Presently, is utilized in the GEOSS Discovery & Access
Brokering framework. (literal)
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