Spatial Data on the Web Working Group


Parsons, Ed (Google)
Taylor, Kerry (CSIRO)

Group Charter:

Download Charter document

Group Description:

End date

30 July 2017


Proceedings are public

Initial Chairs

Kerry Taylor, CSIRO

Ed Parsons, Google

Initial Team Contacts

Denise McKenzie, OGC

Scott Simmons

Phil Archer, W3C

Usual Meeting Schedule

Teleconferences: weekly 

Face-to-face: twice annually, ideally alternating between an OGC TC and W3C's TPAC

The OGC Spatial Data on the Web Working Group (SDWWG) is constituted as a subgroup of the OGC Geosemantics DWG. It will operate in collaboration with a parallel group in W3C of the same name. Further information on the membership arrangements for the groups can be found in the charter. The charter for the OGC SDWWG can be found here.

The Mission of the SDWWG working group is to clarify and formalize the relevant standards landscape for spatial on the web. In particular:


  • to determine how spatial information can best be integrated with other data on the Web;
  • to determine how machines and people can discover that different facts in different datasets relate to the same place, especially when 'place' is expressed in different ways and at different levels of granularity;
  • to identify and assess existing methods and tools and then create a set of best practices for their use;
  • where desirable, to complete the standardization of informal technologies already in widespread use.

All working group proceedings will be available via W3C at

 SDWWG is working on 4 documents. These documents are currently at draft stages. QB4ST adds extensions to the RDF Data Cube for spatio-temporal components. These are designed to make it easier to share and manipulate data such as Earth Observations with linkable slices through time and space. The QB4ST extensions are used in another of today's publications, Publishing and Using Earth Observation Data with the RDF Data Cube and the Discrete Global Grid System, which shows how SPARQL queries can be served through OGC's developing Discrete Global Grid System for observations, coupled with a triple store for observational metadata. The approach makes use of the power of Linked Data on the Web without requiring all data points to be encoded as RDF triples.

 The latest Working Draft of the Semantic Sensor Network Ontology sets out a modular approach that allows alignment with related vocabularies. The modular architecture supports the judicious use of "just enough" semantics for diverse applications, including satellite imagery, large scale scientific monitoring, industrial and household infrastructure, citizen observers, and the Web of Things.

 Finally, the WG is pleased to publish an update to its Spatial Data on the Web Best Practices document that advises on best practices related to the publication and usage of spatial data on the Web; the use of Web technologies as they may be applied to location.

The key links to review are:

QB4ST: RDF Data Cube extensions for spatio-temporal components

Publishing and Using Earth Observation Data with the RDF Data Cube and the Discrete Global Grid System

Spatial Data on the Web Best Practices

Semantic Sensor Network Ontology