Page 1 CSISS Center for Spatial Information Science and Systems Access HDF-EOS data with OGC Web Coverage Service - Earth Observation Application Profile HDF and HDF-EOS Workshop XV Yuanzheng Shao Center for Spatial Information Science and Systems George Mason University

Page 2 CSISS Center for Spatial Information Science and Systems Contents 1.WCS Implementation 3.Useful links 4.Future work

Page 3 CSISS Center for Spatial Information Science and Systems Web Coverage Service 2.0 What’s WCS? –“A WCS provides access to potentially detailed and rich sets of geospatial information, in forms that are useful for client- side rendering, multi-valued coverages, and input into scientific models and other clients” - [OGC r5]. WCS 2.0 –Adopts modular design method. –Harmonizes with EO Metadata Profile of O&M (OGC ), GML coverage model (OGC , GML3.2.1) and SWE Common (OGC ) in range description. –Uses core plus extensions pattern: the core defines a “core” set of requirements and extension specifications add further functionality. –The core specification is not completely implement-able without certain extensions, e.g., format extension.

Page 4 CSISS Center for Spatial Information Science and Systems Web Coverage Service 2.0 EO vocabularyWCS EO AP scene / image / product / raster data (image) / raw data (image) / orthoimage dataset long lat long lat j i rectified grid coverage referenceable grid coverage j i

Page 5 CSISS Center for Spatial Information Science and Systems Web Coverage Service 2.0 EO vocabularyWCS EO AP google-like mosaic / composite mosaic Stitched Mosaic lat long t dataset series 2-D stitched mosaic DescribeEOCoverageSet (mosic ID) provides a set of descriptions of the Dataset used in the Stitched Mosaic DescribeCoverage (mosic ID) provides a descriptions of the mosaic

Page 6 CSISS Center for Spatial Information Science and Systems Web Coverage Service 2.0 EO vocabularyWCS EO AP collectiondataset series long lat t A B D E C A ….. dataset (e.g. scene) B ….. dataset (e.g. seamless mosaic) C ….. datasets of dataset series (e.g. time series) D ….. datasets of dataset series E ….. dataset series (e.g. collection) A dataset may be a member in different Dataset Series

Page 7 CSISS Center for Spatial Information Science and Systems Web Coverage Service 2.0 GetCapabilities, DescribeCoverage, GetCoverage DescribeEOCoverageSet –A request contains one or more identifiers for Dataset, StitchedMosaic, or DataSeries. zero or more spatiotemporal subsetting criteria using long, lat, phenomenonTime (i.e., in WGS84 and/or ISO 8601) an optional “sections” (All, CoverageDescriptions, DatasetSeriesDescriptions) an optional “containment” (contains=completely within, overlaps=anything touched, default) –A response includes the descriptions of the matched data items.

Page 8 CSISS Center for Spatial Information Science and Systems Web Coverage Service 2.0 Protocol Bindings –GET –POST –SOAP Format extensions –NetCDF Encoding Format Extension (V1.0 finished, ) –GeoTIFF Encoding Format Extension (progressing, ) –JPEG2000 Encoding Format Extension (progressing) –HDF-EOS Encoding Format Extension (not started) Protocol Bindings –Range Subsetting Service Model Extension –Scaling & Interpolation Service Model Extension –Predefined CRS Service Model Extension

Page 9 CSISS Center for Spatial Information Science and Systems Implementation Supported data products –HDF-EOS2 Grid, including MOD13C1, MOD09GQ, MYD15A2 –HDF-EOS2 Swath, including MOD05_L2 –HDF-EOS5 Grid, including Aura OMSO2G –HDF-EOS5 Swath, including Aura OMDOAO3 –HDF4, Tropical Rainfall Measuring Mission (TRMM) –NetCDF, NOAA GOES Imager data

Page 10 CSISS Center for Spatial Information Science and Systems Implementation

Page 11 CSISS Center for Spatial Information Science and Systems Implementation Delivery method –File stream –File URL –Multi-part: metadata and file stream Sample URL –geobrain.laits.gmu.edu/cgi- bin/ows8/wcseo?service=wcs&version=2.0&request=getcoverage&cove rageid=MOD13C1.A hdf&subset=Lat,http: // w.opengis.net/def/crs/EPSG/0/4326(-120,- 100)&format=image/geotiff&outputCRS=EPSG:32612&mediatype=multi part/mixed

Page 12 CSISS Center for Spatial Information Science and Systems Implementation WPS (EO) Integrated Client (EO) WCS WCPS Conformance Test Engine ESA Data NASA Data req res req res

Page 13 CSISS Center for Spatial Information Science and Systems Useful links Open Source License –MIT license Source Code Link – v0.1.tar.gz Online Document Link – User Guide Link –

Page 14 CSISS Center for Spatial Information Science and Systems Future Work Update the open-source package with the release of new WCS specification extension. Add the CF-NetCDF support Support more HDF-EOS5 data products Data Lineage (ISO 19115) Integrate OGC CSW service to find data –

Page 15 CSISS Center for Spatial Information Science and Systems Thank you! Yaunzheng Shao George Mason University