Declarative
Sensor Interface Descriptors
for the Sensor Web
A. Broering, S. Below, T. Foerster
WebMGS, 26th August 2010

Motivation: Sensor Plug & Play
Arne Broering - broering@52north.org

Problem: Interoperability Gap
Application Layer
Sensor Web Layer
Sensor Layer
Arne Broering - broering@52north.org

Sensor Interface Descriptors (SID)
Sensor Web Layer
Sensor Layer
Arne Broering - broering@52north.org

SID Model - Overview
Arne Broering - broering@52north.org

SID – Protocol Definition
Arne Broering - broering@52north.org

SID – Protocol Definition
Station|1275482685|33UUU 932 592|10530Q|#
Status|1275482686|2|43|72|0|#
Wind01|1275482698|42.0|23.0|…|#
:
<swe:encoding>
<swe:TextBlock
decimalSeparator="." tokenSeparator="|" blockSeparator="#"/>
</swe:encoding>
:
<swe:DataRecord>
<swe:field name="datasetID">Wind01</swe:field>
<swe:field name="time" />
<swe:field name=“wind_speed"/>
<swe:field name=“wind_direction"/>
:
Arne Broering - broering@52north.org

SID – Protocol Processing
Arne Broering - broering@52north.org

SID – Protocol Processing
 Native Process Types
1. Checksum Computation & Validation
 urn:ogc:def:process:OGC:checksum
2. Character Escaping
 urn:ogc:def:process:OGC:escCharacter
3. Interpolation
 urn:ogc:def:process:OGC:interpolation
4. Date Conversion
 urn:ogc:def:process:OGC:dateConversion
 Content MathML
Arne Broering - broering@52north.org

SID – Definition of Observation Metadata
Arne Broering - broering@52north.org

SID – Definition of Observation Metadata
 <presentationLayer> defines:
 Data type (e.g. numeric)
 Unit of measure (e.g. m/s)
 <outputs> defines:
 Feature of interest (e.g. City of Como)
 Observed property (e.g. wind speed)
  InsertObservation operation calls

SID – Command Definition
Arne Broering - broering@52north.org

SID Interpreter Implementation
http://52north.org/sid
Arne Broering - broering@52north.org

Outlook: Combination with Sensor Bus

Outlook: Graphical SID Creator
Arne Broering - broering@52north.org

Questions?
Thank you!
Arne Broering
SID project: http://52north.org/sid
Sensor Web community: http://52north.org/SensorWeb
Sensor Web lab: http://swsl.uni-muenster.de