Pacific Island Countries GIS/RS User Conference 2010, Suva, 23-26 November 2010 Sensor Web Enablement for the Pacific Vulnerability and adaptation of coastal fisheries to climate change Scientific support for the management of Coastal and Oceanic Fisheries in the Pacific Islands region (SciCOFish) Funded by European Union (10 th EDF)
19
Embed
Pacific Island Countries GIS/RS User Conference 2010, Suva, 23-26 November 2010 Sensor Web Enablement for the Pacific Vulnerability and adaptation of coastal.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Pacific Island Countries GIS/RS User Conference 2010, Suva, 23-26 November 2010
Sensor Web Enablement for the Pacific
Vulnerability and adaptation of coastal fisheries to climate change
Scientific support for the management of Coastal and Oceanic Fisheries in the Pacific Islands region (SciCOFish)
Funded by European Union(10th EDF)
Pacific Island Countries GIS/RS User Conference 2010, Suva, 23-26 November 2010
Climate change monitoring
• Climate change monitoring involves long-term datasets from numerous partners and observation data must be made available
Þ Need for a system to share sensor observations
• Climate change trends are slow compared to interannual or interdecadal climate variability.
The trends can be biased by sensors & process:• Sensor accuracy• Change in methodology/sensor/location
Þ Need for rigorous metadata about sensors, processes and observations
Pacific Island Countries GIS/RS User Conference 2010, Suva, 23-26 November 2010
Open Geospatial Consortium Standards
Web Map Service (WMS)• Requests for geo-referenced map images• 1999: WMS 1.0.0• 2004: WMS 1.3.0
Web Feature Service (WFS)• Requests for geographical features (vector data in GML)• 2002: WFS 1.0.0• 2009: WFS 2.0.0
Web Coverage Service (WCS)• Requests for geographical coverages (raster data in GeoTIFF)• 2003: WCS 1.0.0• 2009: WCS 2.0.0
Some implementations of these services• ArcGIS Server, Geomedia WebMap, MapXtreme, Geoserver, MapServer,…
(see http://www.opengeospatial.org/resource/products/compliant for full list)
Pacific Island Countries GIS/RS User Conference 2010, Suva, 23-26 November 2010
Open Geospatial Consortium Standards
OGC Sensor Web Enablement (SWE) StandardsStandards to exploit web connected sensors and sensor data. 1.0.0 version released in 2006-2007.
Information models• Observation & Measurement Schema (O&M)
Encoding of observations and measurements
• Sensor Model Language (SensorML)Describes sensor systems and processes
• Transducer Markup Language (TransducerML)Describes transducers (response model)
Web services
• Sensor Observation Service (SOS)Provides access to observations
• Sensor Planning Service (SPS)Tasks acquisition from sensors
• Sensor Alert Service (SAS)Subscribe to specific alert type
• Web Notification Service (WNS)Asynchronous communication for long requests
Pacific Island Countries GIS/RS User Conference 2010, Suva, 23-26 November 2010
Observation & Measurement Schema
“An observation is an event that estimates an observed property of a feature of interest using a procedure and generating result.”
Feature of interestDomain specific feature, which is a representation of the observation target for which the observation is made.• Earth realm (ocean, river, sea surface,...)• Named region, location (Micronesia, Kimbe Bay)• Event (cyclone Erica)• System (sensor)
Observed propertyPhenomenon for which the observation result provides an estimate of its value.• Temperature• Humidity
ProcedureDescription of a process used to generate the result (sensor, model, observer)
ResultValue generated by the procedure
Additional propertiesSampling Time, Result Time, Parameter, Metadata, Result Quality
Pacific Island Countries GIS/RS User Conference 2010, Suva, 23-26 November 2010
Observation & Measurement Schema
“An observation is an event that estimates an observed property of a feature of interest using a procedure and generating result.”
Pacific Island Countries GIS/RS User Conference 2010, Suva, 23-26 November 2010
SensorML/TransducerML
There are many ways of measuring a single physical value !
°C
°FK
Pacific Island Countries GIS/RS User Conference 2010, Suva, 23-26 November 2010
SensorML/TransducerML
SensorML is used to define physical (detectors,...) and non-physical (classification, image processing, spatial transforms,...) processes
• Description• Parameters
• Metadata • General information (identifier and classifier)• Constraints (valid time, legal constraints)• Properties (capabilities and characteristics)• References (contacts and documentation)• History
• Inputs (observed phenomena or incoming data for a non-physical process) • Outputs (data created by the process)
Pacific Island Countries GIS/RS User Conference 2010, Suva, 23-26 November 2010
SensorML examples
Example: Garmin GPS 17 HVS <?<sml:SensorML <!-- Derived from Garmin Spec sheet --> <sml:member> <sml:System gml:id="GPS_17HVS"> <gml:description>SensorML instance for a Garmin GPS</gml:description> <gml:name>Garmin GPS 17HVS</gml:name> <sml:identification> <sml:IdentifierList<><sml:identifier> <sml:Term definition="urn:x-ogc:def:identifier:OGC:shortName“>