Scientific article
Open access

WPS mediation: An approach to process geospatial data on different computing backends

Published inComputers & geosciences, vol. 47, p. 20-33
Publication date2012

The OGC Web Processing Service (WPS) specification allows generating information by processing distributed geospatial data made available through Spatial Data Infrastructures (SDIs). However, current SDIs have limited analytical capacities and various problems emerge when trying to use them in data and computing-intensive domains such as environmental sciences. These problems are usually not or only partially solvable using single computing resources. Therefore, the Geographic Information (GI) community is trying to benefit from the superior storage and computing capabilities offered by distributed computing (e.g., Grids, Clouds) related methods and technologies. Currently, there is no commonly agreed approach to grid-enable WPS. No implementation allows one to seamlessly execute a geoprocessing calculation following user requirements on different computing backends, ranging from a stand-alone GIS server up to computer clusters and large Grid infrastructures. Considering this issue, this paper presents a proof of concept by mediating different geospatial and Grid software packages, and by proposing an extension of WPS specification through two optional parameters. The applicability of this approach will be demonstrated using a Normalized Difference Vegetation Index (NDVI) mediated WPS process, highlighting benefits, and issues that need to be further investigated to improve performances.

  • Web Processing Service
  • Mediation
  • Grid computing
  • Geospatial data
  • PyWPS
  • Ganga
  • European Commission - Building Capacity for a Black Sea Catchment Observation and Assessment System supporting Sustainable Development [226740]
Citation (ISO format)
GIULIANI, Gregory et al. WPS mediation: An approach to process geospatial data on different computing backends. In: Computers & geosciences, 2012, vol. 47, p. 20–33. doi: 10.1016/j.cageo.2011.10.009
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Article (Published version)
ISSN of the journal0098-3004

Technical informations

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