1 / 15

Access HDF-EOS data with OGC Web Coverage Service - Earth Observation Application Profile

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 04-18-2012. Contents. WCS 2.0 Implementation Useful links Future work.

ayita
Download Presentation

Access HDF-EOS data with OGC Web Coverage Service - Earth Observation Application Profile

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. 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 04-18-2012

  2. Contents • WCS 2.0 • Implementation • Useful links • Future work

  3. 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 07-067r5]. WCS 2.0 Adopts modular design method. Harmonizes with EO Metadata Profile of O&M (OGC 10-157), GML coverage model (OGC 07-036, GML3.2.1) and SWE Common (OGC 08-094) 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.

  4. Web Coverage Service 2.0 lat lat i i long j long j referenceable grid coverage rectified grid coverage

  5. Web Coverage Service 2.0 lat t DescribeEOCoverageSet (mosic ID) provides a set of descriptions of the Dataset used in the Stitched Mosaic dataset series long DescribeCoverage (mosic ID) provides a descriptions of the mosaic 2-D stitched mosaic

  6. Web Coverage Service 2.0 E 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 B C t D lat A dataset may be a member in different Dataset Series long

  7. 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.

  8. Web Coverage Service 2.0 Protocol Bindings • GET • POST • SOAP Format extensions • NetCDF Encoding Format Extension (V1.0 finished, 10-110) • GeoTIFF Encoding Format Extension (progressing, 10-147) • 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

  9. 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

  10. Implementation

  11. 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&coverageid=MOD13C1.A2009241.005.2009261200123.hdf&subset=Lat,http://www.opengis.net/def/crs/EPSG/0/4326(20,40)&subset=Long,http://www.opengis.net/def/crs/EPSG/0/4326(-120,-100)&format=image/geotiff&outputCRS=EPSG:32612&mediatype=multipart/mixed

  12. Implementation req req Integrated Client Conformance Test Engine ESA Data req res (EO) WCS WPS NASA Data res res (EO) WCS @GMU WCPS

  13. Useful links • Open Source License • MIT license • Source Code Link • http://geobrain.laits.gmu.edu/ows8/wcseo/code/gmu_eowcs_v0.1.tar.gz • Online Document Link • http://geobrain.laits.gmu.edu/ows8/wcseo/doc/index.html • User Guide Link • http://geobrain.laits.gmu.edu/ows8/wcseo/demo/wcseodemo.html

  14. 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 http://cwic.csiss.gmu.edu

  15. Thank you! Yaunzheng Shao George Mason University yshao3@gmu.edu

More Related