ogc sensorthings api - inspire · sensorthings api •sensorthings api is a new ogc standard for...
TRANSCRIPT
OGC SensorThings API A New Approach for Meteorological Data
Introduction
• Why are we here:We want to make data available
• How are we doing it:Utilizing the new OGC SensorThings API
• But is that INSPIRE?Let us show you
Background
• DanubeHack 2017 in Bratislava• CSV File from SHMU with 6 Meteo Parameters for 51 Stations for the last 2 weeks in a DB table
• 4 hours, 2 People
Making Meteo Data Available
Making Meteo Data Available
Making Meteo Data Available
Making Meteo Data Available
Making Meteo Data Available
Making Meteo Data Available
¿JSON?
SensorThings API
• SensorThings API is a new OGC standard for sensor data• IoT background, RestFUL approach following the oData
standard, JSON data• MQTT Interface for direct access to light‐weight sensors• Currently being evaluated as a possible INSPIRE
Download Service• Also being integrated into the OGC Environmental Linked
Features Interoperability Experiment (ELFIE); exploring integration with JSON‐LD
SensorThings API Data Model
INSPIRE EF
Environmental MonitoringFacility
Observing Capability
OM_ProcessGFI_Feature GF_Property
OM_Observation
0..* +observingCapability
0..1 +featureOfInterest1 +observedProperty
+hasObservation 0..*
1 +procedure
0..1 +featureOfInterest
1 +observedProperty1 +procedure
INSPIRE EF
Environmental MonitoringFacility
Observing Capability
OM_ProcessGFI_Feature GF_Property
OM_Observation
0..* +observingCapability
0..1 +featureOfInterest1 +observedProperty 1 +procedure
0..1 +featureOfInterest
1 +observedProperty1 +procedure
+hasObservation 0..*
EF
ObsCaps
FoI ObsProp Process
Observation
INSPIRE EF
EF
ObsCaps
FoI ObsProp Process
Observation
INSPIRE EFEF
Obs Caps
FoI ObsProp Process
Observation
EF
ObsCapsProcess ObsProp
FoI
Observation
INSPIRE EF Details
• Class level mapping clear, but what to do with the mandatory attributes?
• EF Requirements on Thing:• measurement Regime • mobile • operational Activity Period
Provide JSON Object in Thing properties!
INSPIRE EF Details ‐ Thing
INSPIRE STAinspireIdlocalId IDnamespace PROPERTIES/namespacename NAMEmediaMonitored PROPERTIES/mediaMonitoredmeasurementRegime PROPERTIES/measurementRegimemobile PROPERTIES/mobileoperationalActivityPeriodbeginPosition PROPERTIES/beginTimeendPosition PROPERTIES/endTime
INSPIRE EF Details ‐ Datastream
EF Requirements on Datastream:• observing Time • process Type • result Nature • online Resource • featureOfInterest• observedProperty• procedureBut – no properties slot!!!
INSPIRE EF Details ‐ Datastream
INSPIRE STAId IDobserving Time
beginPosition PHENOMENON_TIME_STARTendPosition PHENOMENON_TIME_END
process Type PROPERTIES/processTyperesult Nature PROPERTIES/resultNatureonline Resource PROPERTIES/onlineResourcefeatureOfInterest FEATURE_ID – from ObservationsobservedProperty OBS_PROPERTY_IDprocedure SENSOR_ID
Back to the Background
How did we do it?• Views were created based on the flat CSV dump table for each of FROSTs underlying DB tables (closely aligned to STA Model)
• Viewer developed in OpenLayers utilizing an existing STA as an example
• Data update integrated to base table• 5 minutes before the 4 hours were up, we were live!
Conclusions• SensorThings API is well suited for provision of
meteorological data under INSPIRE• This does require an extension, adding properties
elements to other classes• This has been proposed for the 1.1 Version of STA
• Some issues pertaining to the INSPIRE download services Implementing Rules still open, but should be fairly simple to align (just as has been done for SOS, WFS, WCS...)
• So much simpler to deploy and configure• And even simpler to utilize data!• Publication: www.mdpi.com/2076‐3263/8/6/221
Links
Viewer:• https://apps.klimeto.com/shmu/
SensorThings API:• http://service.datacove.eu:8080/SensorThingsServer‐1.0_SK/v1.0/
Thanks for your attention!
Kathi [email protected]
With support from Martin Tuchyňa ([email protected]) and Peter Hanecak ([email protected])
Tomáš Kliment [email protected]