Sensor web enablement

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Sensor web enablement

• Dr Andrew Woolf
• Andrew.Woolf_at_stfc.ac.uk
• Environmental e-Science and Spatial Informatics
• STFC Rutherford Appleton Laboratory
• Acknowledgement Abraham Ortinez
• Centro de Ciencias de la Atmosfera, UNAM

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The problem
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(N)RT air quality monitoring in UK
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Sensor network

• Would like
• simplified access
• easy to configure integrate in applications
• standardised interface
• no more stovepipes for each new sensor!
• remote, in-situ, fixed, mobile

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E.g. Marine observing network
Image courtesy http//ioos.noaa.gov
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E.g. Air quality monitoring network
Images courtesy http//www.airquality.co.uk
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Solution approach

• Underlying conceptual model

• Query mechanism

list all Instruments measuring salinity in North
Atlantic
Instrument
get all temperature observations in Irish Sea
from eXpendable Bathy Thermograph (XBT)
generates
where were Niskin bottle samples of dissolved
oxygen collected in 1975
Result
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Observations and Measurements
An Observation is an action whose result is an
estimate of the value of some Property of the
Feature-of-interest, obtained using a specified
Procedure
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Observations and Measurements

• Developed by Open Geospatial Consortium
• History
• 2001 v0.3
• 2002 v0.8
• 2003 v0.9 (03-022)
• 2005 v0.1 (05-087)
• 2006 v0.14
• 2007 v0.15.5 (07-022)
• 2008 v1.0 !!!
• 2008 submitted as NWIP to ISO

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Example marine observation

• OM

• Marine observation

• Feature-of-interest
• observed Property
• Procedure
• result

• Atlantic cruise track
• temperature
• thermosalinograph
• 19.2C

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Example air quality

• OM

• Air quality

• Feature-of-interest
• observed Property
• Procedure
• result

• Urban monitoring station
• CO2
• FTIR
• 450 ppm

Image courtesy http//www.atmosfera.unam.mx
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Sensor Observation Service

• Observation Offering
• collection of related sensor observations
• Allows queries against OM model
• GetCapabilities ? service metadata (incl.
  Observation offerings)
• DescribeSensor ? sensor metadata (Procedure)
• GetObservation ? Observation (collection)
• GetResult ? result only
• GetFeatureOfInterest ? observed
  Feature-of-interest

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Sensor Observation Service

• GetObservation
• offering
• eventTime time period(s) of observations
• procedure which sensor system(s)
• observedProperty observed phenomenon
• featureOfInterest observed feature
• result for filtering results

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SOS Concept of Operations
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DescribeSensor

• TransducerML
• for describing information about transducers and
  transducer systems
• SensorML
• for defining processes and processing components
  associated with the measurement and
  post-measurement transformation of observations

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E.g. Marine observing network
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E.g. Mexico City air quality

• Under discussion with Centro de Ciencias de la
  Atmósfera, Universidad Nacional Autónoma de
  México
• air quality information model using OM
• apply SOS to PEMBU real-time met stations
• supplement with air quality monitoring

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Thanks!

• STFC e-Science Centre, Environmental Informatics
• http//www.e-science.clrc.ac.uk/organisation/staff
  /andrew_woolf/
• OGC Sensor Web Enablement specs
• http//www.opengeospatial.org/projects/groups/sens
  orweb
• Integrated Ocean Observing System testbed
• http//www.openioos.org/
• PEMBU
• http//pembu.atmosfcu.unam.mx/php/estaciones.php