LinkedSensorData

Datasets part of the Semantic Sensor Web and STT project at Kno.e.sis.

Linked Sensor Data

LinkedSensorData is an RDF dataset containing expressive descriptions of ~20,000 weather stations in the United States. The data originated at MesoWest, a project within the Department of Meterology at the University of Utah that has been aggregating weather data since 2002.[1] On average, there are about five sensors per weather station measuring phenomena such as temperature, visibility, precipitation, pressure, wind speed, humidity, etc. In addition to location attributes such as latitude, longitude, and elevation, there are also links to locations in Geonames that are near each weather station. This sensors description dataset is now part of the LOD.

Name	Download
LinkedSensorData	gzip

Linked Observation Data

LinkedObservationData is an RDF dataset containing expressive descriptions of hurricane and blizzard observations in the United States. The data originated at MesoWest, a project within the Department of Meterology at the University of Utah that has been aggregating weather data since 2002.[2] The observations collected include measurements of phenomena such as temperature, visibility, precipitation, pressure, wind speed, humidity, etc. The dataset includes observations within the entire United States during the time periods that several major storms were active -- including Hurricane Katrina, Ike, Bill, Bertha, Wilma, Charley, Gustav, and a major blizzard in Nevada in 2003. These observations are generated by weather stations described in the LinkedSensorData dataset introduced above. Currently, this dataset contains almost two billion triples.

Name	Storm Type	Date	#Triples	#Observations	Download
ALL			1,730,284,735	159,460,500
Bill	Hurricane	August 17 - August 22, 2009	231,021,108	21,272,790	gzip
Ike	Hurricane	September 1 - September 13, 2008	374,094,660	34,430,964	gzip
Gustav	Hurricane	August 25 - August 31, 2008	258,378,511	23,792,818	gzip
Bertha	Hurricane	July 6 - July 17, 2008	278,235,734	25,762,568	gzip
Wilma	Hurricane	October 17 - October 23, 2005	171,854,686	15,797,852	gzip
Katrina	Hurricane	August 23 - August 30, 2005	203,386,049	18,832,041	gzip
Charley	Hurricane	August 9 - August 15, 2004	101,956,760	9,333,676	gzip
	Blizzard	April 1 - April 6, 2003	111,357,227	10,237,791	gzip

Data Access

Ontology: sensor-observation.owl
Browse: Pubby Browser
Query: Virtuoso SPARQL Endpoint

Example Query

Find all sensors that detected freezing temperatures on April 1, 2003, between 1:00am to 3:00am.

prefix om-owl:<http://knoesis.wright.edu/ssw/ont/sensor-observation.owl#> 
prefix rdf:<http://www.w3.org/1999/02/22-rdf-syntax-ns#> 
prefix weather:<http://knoesis.wright.edu/ssw/ont/weather.owl#> 
prefix sens-obs:<http://knoesis.wright.edu/ssw/> 
prefix xsd:<http://www.w3.org/2001/XMLSchema#> 
prefix owl-time:<http://www.w3.org/2006/time#> 

SELECT DISTINCT ?sensor
WHERE { 
	?sensor om-owl:generatedObservation ?observation .
       ?observation rdf:type weather:TemperatureObservation .
       ?observation om-owl:samplingTime ?time .
       ?time owl-time:inXSDDateTime ?xsdtime .
       ?observation om-owl:result ?result .
       ?result om-owl:floatValue ?value .
       ?result om-owl:uom weather:fahrenheit .
   
       FILTER(?value <= "32.0"^^xsd:float)
       FILTER(?xsdtime >= "2003-04-01T01:00:00-07:00^^http://www.w3.org/2001/XMLSchema#dateTime")
       FILTER(?xsdtime <= "2003-04-01T03:00:00-07:00^^http://www.w3.org/2001/XMLSchema#dateTime")
}

Publications

Provenance Aware Linked Sensor Data
- Harshal Patni, Satya S. Sahoo, Cory Henson, and Amit Sheth
- in Proceedings of 2010 2nd Workshop on Trust and Privacy on the Social and Semantic Web, Co-located with ESWC, Heraklion Greece, 30th May - 03 June 2010.
Linked Sensor Data
- Harshal Patni, Cory Henson, and Amit Sheth
- in Proceedings of 2010 International Symposium on Collaborative Technologies and Systems (CTS 2010), Chicago, IL, May 17-21, 2010.

LinkedSensorData

Contents