Using a Sensor Observation Service (SOS) for E1a and E2a

Transcription

1 Using a Sensor Observation Service (SOS) for E1a and E2a Olav Peeters Belgian Interregional Environment Agency (IRCEL CELINE)

2 Content SOS what is this? SOS and the IPR schema Development of an IPR compliant SOS Future developments The bigger picture 2

3 Sensor observation services (SOS) - Efficient transmission of time series Geographic position - querriable: Timestamp & measured concentrations (e.g. 24 hours) 3

4 Sensor observation services (SOS) SOS is an OGC-standard components: DB with O&M data model (PostgreSQL, but also MySQL, Oracle, MS SQL server) Java runtime environment (JRE) Servlet Container (e.g. Apache Tomcat) WAR file ( Web server (Apache of Nginx) GetCapabilities, GetObservation, DescribeSensor RegisterSensor, InsertObservation GetFeatureOfInterest, GetObservationById, GetResult 4

5 SOS and the IPR (and INSPIRE) The IPR data model expects some extra elements starttime and endtime Validity and verification flag The IPR header More convenient to have IPR specific interpretation of standard SOS elements e.g. URI's as pollutant names INSPIRE specifications for downloading services Service has to be able to handle multilingual Return geometry in multiple coordinate systems Some extra metadata elements 5

6 IPR compliant SOS Development of an open source implementation has been completed (financed by NL, SE, UK and BE) Multilingual response Flexible identifiers ( versus PM10) Configurable reporting header (plus specific elements per data flow) e.g. wget service=aqd&version=1.0.0&request=getobservation&re sponseformat=http%3a%2f%2fdd.eionet.europa.eu %2Fschemaset%2Fid eu-1.0 6

7 The admin GUI 7

8 How to implement? Generate new DB during install Use legacy DB and prepare with materialised views (in a separate schema) SOS server uses Hibernate as an abstraction layer between the server (SOS endpoint) and DB Well tested on Oracle, MySQL, MS SQL Sever and PostGreSQL In theory all ODBC 8

9 Default DB versus a legacy system Alternatively... CREATE MATERIALIZED VIEW (as fast as a physical table) REFRESH MATERIALIZED VIEW (every time you update your DB) You can separate these SOS specific virtual tables in a separate DB schema Default database created during install

10 Documentation General documentation SOS server INSPIRE Download Service extension erviceivdocumentation#inspire_download_service_extensi About the additional elements/functionalities for e-reporting erviceivdocumentation Flexible identifiers

11 Future development Also implementation data flow D (additional funding needed) Setting up a harvesting system EEA harvesting UTD from SOS-endpoint maintained by the member states

12 The bigger picture using the same service for multiple purposes

13 IRCEL CELINE Intergewestelijke Cel voor het Leefmilieu (IRCEL) Cellule Interrégionale de l'environnement (CELINE) Belgische Interregionale Umweltagentur (IRCEL - CELINE) Belgian Interregional Environment Agency (IRCEL - CELINE) Cooperation agreement between the three Belgian regions Vlaamse Milieumaatschappij (VMM) Leefmilieu Brussel Bruxelles Environnement Agence wallonne de l'air et du Climat (AWAC) 13

14 IRCEL CELINE The three Belgian networks 14

15 IRCEL CELINE Most important functions of IRCEL - CELINE (air quality): Continuous forecasts (cf SMOG alert) Informing the public on air quality (real-time and assessment) National report under the air quality directive (2004/107/EC) Enforcing a common scientific basis between monitoring networks Interregional calibration laboratory Interregional data processing centre (IDPC) - real-time database National Focal Point (Eionet) Compilation GHG inventory 15

16 IRCEL CELINE - Real-time data - All major pollutants (incl. BC) - Forecasts - Information about pollutants - Publications - Etc. Integration of OGC-services into website via light weight Leaflet viewer ( and tables with (real-time) data:

17 e-reporting the general idea (INSPIRE)-services Reporting obligations SOS (UTD-data incl. data quality flags) The general public Incl. validation steps & official approval SOS/WFS (validated and/or aggregated) WMS/WCS (e.g. modeled data) The Commission IPR (2011/850/EU) XML-schema for reporting under the Air Quality directive (2008/50/EC) e.g. SPARQLEndpoint (Linked Data e.g. Plans and Programs ) 17

18 Using our SOS in projects: PMLab 18

19 Using our SOS in projects: ATMOSYS 19

20 SOS-server within the - project 20

21 A REST-api of the same data 21 (restful-timeseries-webapp)

22 REST-api Why? JSON versus XML Speed versus interoperability also PNG, PDF, pre-rendered graphics (server-side control on styling) caching How? e.g. via a WAR in a servlet container Can proxy data from SOS-server or serve straight from a DB Our end-point: Documentation REST-api: 22

23 SOS en de REST-api A first proto-type of an app (beta) (browser preview is only possible with Chrome or Firefox) build with: zie: Online build: 23

24 Lichte webviewer canvas view refining the code-base 24

25 A light-weight webviewer map view 25 Open source code base:

26 Lichte webviewer table view 26

27 SOS4R install.packages( sos4r ) Under development: Linking the REST-api to R for real-time statistical analysis The R-project for statistical analysis: User friendly GUI: install.packages( openair ) 27

28 Thank you! Olav Peeters Belgian Interregional Environment Agency (IRCEL CELINE) 28