Linked Sensor Data

Harshal Patni, Cory Henson, Amit P. ShethOhio Center of Excellence in Knowledge enabled Computing (Kno.e.sis)

Wright State University, Dayton, OH

48th ACM Southeast Conference. ACMSE 2010. Oxford, Mississippi. April 15-17, 2010.

OUTLINE

Application on Linked Sensor Data What is Linked Sensor Data Sensor Datasets Generated Data Generation Workflow Future Work Conclusion

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Sensor Discovery Application

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Weather Station ID

Weather Station Coordinates

Weather Station Phenomena

Current Observations from MesoWest

MesoWest – Project under Department of Meteorology, University of UTAH

GeoNames – Geographic dataset

What is Linked Sensor Data

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Weather Sensors

Camera SensorsSatellite Sensors

GPS SensorsSensor Dataset

What is Linked Sensor Data

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Sensor Dataset

Publicly Accessible

Recommended best practice for exposing, sharing, and connecting pieces of data, information, and knowledge on the Web using URIs and RDF

RDF – language for representing data on the Web

loca

tedNea

r

GeoNames Dataset

znSensor Datasets

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LinkedSensorDataset

• RDF Descriptions of ~20,000 weather stations in US• Average 5 sensors/weather station• Spatial attributes of the weather station• Links to locations in Geonames

LinkedObservationDataset

• RDF descriptions of Hurricanes and Blizzard observations in US

• Observations generated by sensors described in LinkedSensorDataset

MesoWest Service Data

OGC Observation and Measurement

(O&M)RDF Instance Virtuoso RDF store

Data Generation Workflow

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O&M2RDFCONVERTER

Workflow – Phase 1

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MesoWest Service Data

OGC Observation

and Measurement

(O&M)

RDF Instance Virtuoso RDF store

Workflow – Phase 2

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MesoWest Service Data

OGC Observation

and Measurement

(O&M)

RDF Instance Sesame RDF store

Workflow – Phase 3

MesoWest Service Data

OGC Observation

and Measurement

(O&M)

RDF Instance Virtuoso RDF store

Sensor Ontology

Ontology – formal representation of knowledge by a set of concepts and relationship between those concepts

Figure 1: System Components and Architecture

Workflow – Phase 3

MesoWest Service Data

OGC Observation

and Measurement

(O&M)

RDF Instance Virtuoso RDF store

Workflow – Phase 4

MesoWest Service Data

OGC Observation

and Measurement

(O&M)

RDF Instance Virtuoso RDF store

Open Source RDF store by OpenLink Software for storing RDF data

Future Work

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Linked Observation DatasetTemporal

Linking the LinkedObservationDataset to DBpedia (RDF extraction of Wikipedia)

Linked Sensor DatasetSpatial

x

• Publicly accessible Rich Weather Sensor datasets• Datasets are easy to query• Able to query Sensors based on location names• Built O&M2RDFConverter to generate more publicly

accessible sensor datasets

CONCLUSION

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ACKNOWLEDGEMENTS

People Joshua Pschorr

Air Force Research Lab Wright-Patterson Air Force Base

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QUESTIONS

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• Semantic Web – is an extension of the current web in which data is expressed in a common vocabulary making such that the data becomes machine processable.

• Ontology – is a specification of concepts and relationships between them.

• Triple - a ternary relation containing an entity pair and a relationship that expresses the link between them i.e. subject-predicate-object

• Entity/Concept – an instance of a thing

• URI – a unique identifier for any resource/entity/thing on the web

• LOD - a semantic web initiative to provide a repository of semantically connected datasets

TERMINOLOGY

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