OGC Web Services at KNMI

1. OGC Web Services at KNMI 20th annual meeting of the European Working Group on Operational meteorological Workstations (EGOWS) De Bilt, June 8, 2009 Raymond Sluiter R&D Information and Observation Technology KNMI raymond.sluiter@knmi.nl

2. Outline • OGC Web Services introduction • (Potential) use at KNMI • Demonstration project: ADAGUC • Conclusions

3. OGC Web Services OGC Web Services use open standards for interoperable data exchange of georeferenced data. KNMI is currently focussing on the following services and standards: WMS - Web Mapping Service – For visualization of maps WCS - Web Coverage Service – To retrieve raster data WFS - Web Feature Service – To retrieve vector data CSW/CAT – Catalogue Services – To publish and search metadata. SWE - Sensor Web Enablement – Suite of standards to make all types of sensors, transducers and sensor data repositories discoverable, accessible and useable via the Web

4. (Potential) use at KNMI External data exchange: Exchange data between the meteorological and geospatial community Exchange data within the national GSDI Exchange data within the international GSDI (INSPIRE) interpolated average temperature radar

5. (Potential) use at KNMI Internal data exchange: Data source for GIS based climatological and meteorological research. Data source for operational meteorology (MWS) - connect to services from standalone MWS - connect to services through web based portal “Web Service Enablement” of KNMI intranet products (Weather portal (“weather filing cabinet”))

6. (Potential) use at KNMI “Web Service Enablement” of KNMI intranet products

7. Demonstration project:ADAGUC Atmospheric Data Access for the Geospatial User Community (ADAGUC), http://adaguc.knmi.nl Bridging the geospatial and meteorological community Atmospheric Datasets in GIS systems Metadata: ISO-19115, INSPIRE, NL Metadata Standard, Climate and Forecast metadata convention , OGC > WMS, WFS,WCS Web Mapping Service (For visualization) Web Feature Service (To retrieve vector data) Web Coverage Service (To retrieve raster data) http://adaguc.knmi.nl

8. SCIAMACHY Web browser Binary ECMWF Binary Binary ArcGIS WMS ADAGUC Container Format Binary GOME GDAL/OGR gvSIG ADAGUC Container Format Binary ADAGUC Portal ASCII ADAGUC Container Format WFS uDIG Binary Binary OMI WCS Other GoogleEarth MSG … & many others radar OGC Web Services http://adaguc.knmi.nl DATA PRODUCTS SERVICES

9. NetCDF4 as data carrier • Joint project between Unidata and HDF Group • NetCDF 4 uses HDF5 as the storage layer of NetCDF • Programming interfaces are backward compatible with the netCDF3 programming interface http://adaguc.knmi.nl NetCDF3 popular, simple, lots of tools, multiple implementations HDF5 powerful, high-performance, storage efficiency, extensibility NetCDF4 Best of both formats combined!

10. ADAGUC product standard (available on website) http://adaguc.knmi.nl

11. Metadata: find- and use-ability • Self contained in data files • INSPIRE – ISO 19115 • Climate and Forecast convention http://adaguc.knmi.nl

12. GDAL/OGR drivers Open source translator library for raster geospatial data formats Used in many software products UMN MapServer, GeoServer, Quantum GIS, ArcGIS, GRASS, OpenEV etc.. GDAL - Geospatial Data Abstraction Library • Access raster data OGR - Simple Feature Library • Access vector data GDAL/OGR extensions for the ADAGUC format standard are available: http://adaguc.knmi.nl http://trac.osgeo.org/gdal/wiki/ADAGUC

13. ADAGUC portalstacked on WMS/WFS/WCS http://adaguc.knmi.nl WMS GetLegendGraphic WMS GetMap WMS GetCapabilities WMS GetFeatureInfo

14. Download from portal • Obtaining the real data through OGC services or the original ADAGUC (NetCDF/HDF5) files • WFS or WCS ? • WebGIS client selects the appropriate service depending on the datatype (raster/vector) • WCS – obtain optimal parameters: • Predefined bounding box, columns, rows and cell size • No resampling/interpolation User is always free to adjust the parameters • User must select his favorite (GIS) format http://adaguc.knmi.nl

15. ECMWF model 2D params + time http://adaguc.knmi.nl

16. AMSR Soil Moisture http://adaguc.knmi.nl

17. GOME: Ozone, Cloud fraction http://adaguc.knmi.nl

18. Sciamachy Methane monthly avg http://adaguc.knmi.nl

19. RADAR Rain Rate in real time http://adaguc.knmi.nl

20. RADAR Rain Rate in real time KNMI WMS at the Dutch National Institute for Public Health and the Environment (RIVM) http://adaguc.knmi.nl

21. RADAR Rain Rate in real time KNMI WMS in NinJo… http://adaguc.knmi.nl

22. GIS programs using ADAGUC http://adaguc.knmi.nl ArcGIS Explorer Google Earth Quantum GIS gvSIG ArcGIS Desktop UDIG IDV HDF Explorer NASA’S Panoply

23. Conclusions • Large potential for OGC web services at KNMI for external and internal data exchange • ADAGUC portal and services are ready: • Satellite, model, and radar datasets are available and more will follow. • Next challenges: • Start using catalogue services (CSW/CAT). • Data policies, operational status. • 4 dimensional data. • Client applications should work on supporting the OGC standards.

24. Thank you for your attention ! Please visit: http://adaguc.knmi.nl for WMS/WFS/WCS services (with real atmospheric data) Webportal Product descriptions Software Documentation (including over 40 ADAGUC presentations) In preparation: IEEE Selected Topics in Applied Earth Observation and Remote Sensing (J-STARS) “Heterogeneous data access and use for geospatial user communities”