OGC Technical Committee Huntsville, 2006-03-08 GALEON – NERC/CCLRC experience Andrew Woolf e-Science Centre, CCLRC Rutherford.

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Presentation transcript:

OGC Technical Committee Huntsville, GALEON – NERC/CCLRC experience Andrew Woolf e-Science Centre, CCLRC Rutherford Appleton Lab Acknowledgments: Dominic Lowe (British Atmospheric Data Centre) Jon Blower (NERC Environmental Systems Science Centre) Nathan Bindoff, Glenn Hyland, Jason Roberts, Ian Cummings (Tasmanian Partnership for Advanced Computing) NERC DataGrid team

OGC Technical Committee Huntsville, Recommendations 1.Consider CSML Grid for irregular grid domains gridI gridJ gridI gridJ Linear

OGC Technical Committee Huntsville, Recommendations 2.Support New Work Item Proposal for ISO (Spatial referencing by coordinates - extension for parametric values), OGC (some informative examples motivated by CF conventions) Scope: To define an extension of ISO 19111:2005 covering coordinate referencing systems where the coordinates are physical or material properties measured by parameters, such as pressure, rather than linear distance measurements. It defines a conceptual schema for the description of spatio-parametric coordinate reference systems. These parametric spatial reference systems will be modelled so that they may be associated with an ISO [horizontal] spatial coordinate reference system to form a compound spatio-parametric coordinate reference system.

OGC Technical Committee Huntsville, Recommendations 3.Rationalise binary encoding in GML (for coverage range and domain) Record Interleaved application/x-netcdf

OGC Technical Committee Huntsville, Recommendations 4.Add CF-netCDF to allowed formats HDF netCDF HDF-EOS CF-netCDF 5.BBOX clarification w.r.t. CRS e.g. EPSG:4979 (lat, lon, height) BBOX=lat1,lon1,height1,lat2,lon2,height2, not BBOX=minx,miny,maxx,maxy,minz,maxz

OGC Technical Committee Huntsville, Recommendations 6.Harmonise WMS, WCS: BBOX and ELEVATION WCS 1.0.0: BBOX=minx,miny,maxx,maxy,minz,maxz WMS 1.3.0: BBOX=minx,miny,maxx,maxy&ELEVATION=m inz/maxz/resz

OGC Technical Committee Huntsville, Recommendations 7.Eliminate mandatory WIDTH (RESX), HEIGHT (RESY), DEPTH (RESZ) to enable arbitrary slicing through four dimensions e.g., Hovmüller (timeseries) of winds from E BBOX=110,-45,190,-45,1000,1000&TIME= / HEIGHT (RESY) and DEPTH (RESZ) irrelevant

OGC Technical Committee Huntsville, Recommendations 8.Clarify interpolation vs subsampling netCDF API: nc_get_vars_*(ncid,varid,start,count,stride,buf) OPeNDAP: WCS should support subsampling –behaviour of INTERPOLATION? 9.Conventions for exposing netCDF attributes in WCS metadata, e.g.: netCDF variable name WCS CoverageOffering/name CF long_name WCS CoverageOffering/label CF standard_name WCSCoverageOffering/rangeSet/RangeSet/label

OGC Technical Committee Huntsville, Recommendations 10.Clarify roles of temporalDomain and spatialDomain/EnvelopeWithTimePeriod unclear whether temporalDomain mandatory for time-dependant data Experimental WCS (and full report) at: