Connecting R to the Sensor Web

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Interoperable data exchange and reproducibility are increasingly important for modern scientific research. This paper shows how three open source projects work together to realize this: (i) the R project, providing the lingua franca for statistical analysis, (ii) the Open Geospatial Consortium's Sensor Observation Service (SOS), a standardized data warehouse service for storing and retrieving sensor measurements, and (iii) sos4R, a new project that connects the former two. We show how sos4R can bridge the gap be-tween two communities in science: spatial statistical analysis and visuali-zation on one side, and the Sensor Web community on the other. sos4R enables R users to integrate (near real-time) sensor observations directly into R. Finally, we evaluate the functionality of sos4R. The software en-capsulates the service's complexity with typical R function calls in a com-mon analysis workflow, but still gives users full flexibility to handle in-teroperability issues. We conclude that it is able to close the gap between R and the sensor web.

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Connecting R to the Sensor Web

1. Connecting R tothe Sensor WebDaniel Nüst52°North Initiative forGeospatialOpen Source Software GmbHAGILE 2011, Utrecht

2. motivation

3. open data, reproducibleresearch open sourceneedfor SWE analysisclientsspread SOSpower ofR

5. sensor web

8. (OGC) web services in R?

9. featuresclientexchangeabilityfilteringclassesandmethodsTested SOSs

10. client

11. exchangeabilitymyParseSensorML <- function(obj) {root <- xmlRoot(obj)return(xmlName(root))}mysos = SOS(url = "http://www.sos.de/sos",parsers = SosParsingFunctions( "DescribeSensor" = myParseSensorML) )

12. issues

13. someexamples

14. > source("http://www.nordholmen.net/sos4r/agile2011/connecting-r-to-the-sensor-web-2011.R")http://www.nordholmen.net/sos4r/agile2011/

15. http://www.nordholmen.net/sos4r/agile2011/

19. status quo

20. tasksandroadmap

21. thankyou!contact: d.nuest@52north.orgblog: www.nordholmen.net/sos4rcommunity: http://52north.org/geostatistics/