ogc sensor web enablement - perey research & consulting

© iGSI ± Ingo Simonis

OGC Sensor Web Enablement

Ingo Simonis International Geospatial Services Institute


Why did we Start the “Sensor Web”


… disconnected


SWE as Problem Solver

l  How do I access the data

l  Where is the existing data (Discovery)

l  I need to create new sensor data

l  What's the lineage of data (Provenance)


The Problems Continue

l  Error bars associated with data

l  Integration of data

-  Different formats

-  Little known formats

l  Real time access to data


Still More Problems

l  Not enough data (Sparse)

l  Too much data (Overload)

-  Subsetting

-  Filtering

l  Push the data to me when its becomes available


OGC: Sensor Web


From Sensors to Applications

Sensor Layer

Sensor Web Layer

Application Layer

Sensor & Sensor Network Management

Sensor Web Portals

Web of Things

Sensor & Actuator Devices

Sensor Web Applications

Sensor & Sensor Data

Services Internet of

Things


WSN-Oriented Approaches

Sensor Layer

Sensor Web Layer

Application Layer


Sensor Web Portals

Internet of

Things

Web of Things




Services

WSN

Routing Commu-nication

Energy optimization

Coverage optimization


Portal-Oriented Approaches

Sensor Layer

Sensor Web Layer

Application Layer


Sensor Web Portals

Internet of

Things

Web of Things




Services

Pachube SenseWeb Sensor-pedia


Sensor Web Layer-Focused Approaches

Sensor Layer

Sensor Web Layer

Application Layer


Sensor Web Portals

Internet of

Things

Web of Things




Service SWE


Sensor Web Requirements

Discover

Get Data

Describe

Subscribe

Task


Building Blocks: Sensor Web

Registries & Dictionaries

Sensor Description Language

Phenomenon Description Language

Services

Observation Tasking Alerting Analysis


Building Blocks: OGC SWE

Registries & Dictionaries

Sensor Description Language

Phenomenon Description Language

Services

Observation Tasking Alerting Analysis

SensorML O&M TML

TML SOS SPS SAS/ SES WNS

CS-W


SWE FOR AR SWE Encodings & Services


SWE SERVICES SPS, SOS


SWE Services

±  XML/SOAP over HTTP

±  RESTful in discussion

±  Early: Provide rich data - trust users to filter

±  Now: Start thinking about pre-organization of data

±  All services are “self-descriptive”

±  SOS/SPS: Spatio/temporal features, observed feature, phenomenon, sensor…


SOS & SPS: Data Access & Control

18

SOS SPS SWE

data access tasking

Applications


SOS: Data Access Service

±  GetCapabilities - metadata and detailed information about an SOS instance

±  DescribeSensor - detailed information about the sensors and sensor systems available by an SOS server

±  GetObservation - observations; allows spatial, temporal and thematic filtering


SPS: Tasking Sensors/Actuators

Sensor1 Logic

Sensor2 Logic

Data Service

GetCapabilities Capabilities

DescribeTasking Tasking Parameters

GetFeasibility Feasibility Study Result

Submit

Update/GetStatus/Cancel

Data Service(s) endpoint(s) DescribeResultAccess

Client SPS

send data send notification message

access data

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SENSOR ML, O&M, SWE COMMON SWE Encodings


Data Exchange

Generality Interoperability

Soft-typed hard-typed


Data Structure & Encoding

±  SweCommon:

±  Mixture of hard/soft-typed approaches

±  Allows to describe structure

±  Encodes values independently

±  Allows for referenced and inline data


O&M Model


SensorML

±  Sensor and Process description language

±  Uses SWE Common

±  Very generic


AR

±  Build O&M AS

±  Define features

±  Defines observable properties

±  Define result types

±  Go testing!

ogc sensor web enablement - perey research & consulting

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