ogc web services at knmi
DESCRIPTION
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 [email protected]. Outline. OGC Web Services introduction - PowerPoint PPT PresentationTRANSCRIPT
20th annual meeting of the European Working Group on 20th annual meeting of the European Working Group on Operational meteorological Workstations (EGOWS)Operational meteorological Workstations (EGOWS)
De Bilt, June 8, 2009De Bilt, June 8, 2009
OGC Web Services at KNMIOGC Web Services at KNMI
Raymond SluiterR&D Information and Observation TechnologyKNMI
Outline
1. OGC Web Services introduction2. (Potential) use at KNMI3. Demonstration project: ADAGUC4. Conclusions
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
(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 temperatureinterpolated average temperature radarradar
(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”))
(Potential) use at KNMI“Web Service Enablement” of KNMI intranet products
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)
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OGC Web Services
DATA PRODUCTS SERVICES
BinaryBinaryBinary
BinaryBinary
BinaryBinaryOther
WMS
WCS
WFS
ADAGUCContainer
Format
SCIAMACHYSCIAMACHY
ECMWFECMWF
radar
GOMEGOME
OMIOMI
MSGMSG
GDAL/OGRADAGUCContainer
Format
ADAGUCContainer
Format
ASCII
ArcGIS
AD
AG
UC
Port
al
uDIG
gvSIG
GoogleEarth
…
& many others
Web browserhtt
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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
NetCDF3popular, simple, lots of tools,
multiple implementations
HDF5powerful, high-performance,
storage efficiency, extensibility
NetCDF4
Best of both formats combined!
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ADAGUC product standard (available on website)
product
Vector data
projection
TDTNO2 (time)
A
B
iso_dataset
SCIA__OPER_V___TDNO2 … h5
time
lat (time)
lon (time)
lat_bnds (time)
lon_bnds (time)
C
TDCNO2 (time)
product
Geographic raster data
projection
TMTNO2 (time, lat, lon)
A
B
iso_dataset
SCIA__OPER_R___TMNO2 … h5
lon
lat
TMCNO2 (time, lat, lon)
C
time
product
Projected raster data
projection
NL25PCP (time, y, x)
A
B
iso_dataset
RADAR_OPER_R___NL25PCP … h5
lon (y,x)
lat (y,x)
C
time
x
y
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Metadata: find- and use-ability
Self contained in data files INSPIRE – ISO 19115 Climate and Forecast convention
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GDAL/OGR drivers
Open source translator library for raster geospatial data formats
Used in many software productsUMN 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://trac.osgeo.org/gdal/wiki/ADAGUChttp://trac.osgeo.org/gdal/wiki/ADAGUC
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ADAGUC portalstacked on WMS/WFS/WCS
WMS GetCapabilitiesWMS GetMap
WMS GetFeatureInfo
WMS GetLegendGraphic
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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
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ECMWF model 2D params + timeh
ttp
://a
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AMSR Soil Moistureh
ttp
://a
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GOME: Ozone, Cloud fractionh
ttp
://a
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Sciamachy Methane monthly avgh
ttp
://a
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RADAR Rain Rate in real timeh
ttp
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RADAR Rain Rate in real time
KNMI WMS at the Dutch National Institute for Public Health and the Environment (RIVM)
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RADAR Rain Rate in real time
KNMI WMS in NinJo…
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GIS programs using ADAGUC
ArcGIS ExplorerArcGIS Explorer Google EarthGoogle Earth Quantum GISQuantum GIS
gvSIGgvSIG ArcGIS DesktopArcGIS Desktop UDIGUDIG
IDVIDV HDF ExplorerHDF Explorer NASA’S PanoplyNASA’S Panoply
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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.
Please visit:
http://adaguc.knmi.nlfor
WMS/WFS/WCS services (with real atmospheric data)
WebportalProduct descriptions
Software Documentation
(including over 40 ADAGUC presentations)
Thank you for your attention !
In preparation: IEEE Selected Topics in Applied Earth In preparation: IEEE Selected Topics in Applied Earth Observation and Remote Sensing (J-STARS) Observation and Remote Sensing (J-STARS)
““Heterogeneous data access and use for geospatial Heterogeneous data access and use for geospatial user communities”user communities”