From: Simone G. <sim...@gm...> - 2008-08-14 10:54:13
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Ciao Jon, sending this email just to throw some information in the mix about what we have been doing on the netCDF side of the world. I am going to split things in levels, from imageio to geoserver <IMAGEIO> - Daniel, Alessio and partly me have been working at the lowest imageio level trying to implement imagio readers with no geospatial notion for -- netcdf-cf (pure java) -- grib1 (soon grib2 as well) pure java -- various hdf profiles, using the NCSA java bindings, which we have rewritten from scratch since we were having all sort of failures Note that for the moment we refer to these plugins as the "flat" plugins. This work has been recently (after a long discussion with a client :-) ) moved to the spike directory of the imageio-ext project here: https://imageio-ext.dev.java.net/source/browse/imageio-ext/spike/nd-work/ The project is open source and there is a decent extent of documentation. We have plans to work on these plugins until the end of next summer adding other formats as well like more HDF profiles, HDF-EOS and, depending on some NDAs I have signed JPEG2000. Note that all this is independent from the gdal-based plugins. - We have tried to cooperate with the GeoMatys guys on the definition of a set of spatiotemporal metadata in order to write geospatial enabled Imageio plugins. This work is captured in this google document ttp://docs.google.com/Doc?id=dgcvg3gc_34cpxtgkkv&hl=it <GeoTools> This is where we are mostly working right now: - Jody Garnett together Daniele (and some limited feedback from myself) is working on implementing a replacement for the old coverarge I/O API, namely the GridCoverageEchange API, which have been deprecated since ages. We might want to put together a proposal to the GeoApi project afterwards in order to replace the old GCE. This work is going on under the geotools spike directory in the svn (geotools trunk branch) -Daniele and Alessio are working on implementing what we call "smart" Imageio readers for netcdf-cf, hdf-avhrr and grib1. A smart reader is simply a wrapper for a flat reader which add geospatial metadata to it. We are still talking about 2D raster data but with geospatial metadata describing detp/elevation, CRS, bbox, time, etc... This in the future should reside inside GeoTools since it would depend on other Geotools core modules This work is actually on our private svn, but we could make it available. - Jody Garnett and Daniele are working on building new geotools plugins which would leverage on the above mentioned smart readers in order to build coverages out of 2D rasters. For the first deliverable we should just produce 2D coverage but in the future we are looking into going a step further (iso 19123 or something similar I guess) This work is actually on our private svn, but we could make it available. <GeoServer> - Alessio has already implemented and committed the EMF bindings to allow GeoServer 1.7.x to parse BAND,TIME,DEPTH/ELEVATION params in the GeoServer. The work in under revision and should be committed soon. Note that for the TIME parsing we reused the temporal work done byt GeoMatys. - Alessio is working his way through refactoring the UI and configuration of GeoServer using stubs of the new CoverageIo interfaces which jody is defining in order to make possible to serve 2D coverages out of multidimensional ones for netcdf-cf, grib1 and hdf-avhrr. We are targeting mid sept to have a working demo for WMS 1.1.1 and WCS 1.0. Afterwards we will work on WMS 1.3 and WCS 1.1. The end goal is to have the GeoServer able to do animations from WMS and return multidim coverages (netcdf-cf as an instance) from WCS, but for this are talking about next year much probably. Ciao, Simone. On Wed, Aug 13, 2008 at 12:48 PM, Jon Blower <jd...@ma...> wrote: > > Hi Martin, > > Would it help you if we worked together on some of these problems to > try to produce a NetCDF reader that meets all of our needs? Also, as > a separate question, do you plan on working on the configuration of > GeoServer itself (to register NetCDF datasets in the catalog) or is > all your work at the GeoTools level? > > Cheers, Jon > > On Wed, Jul 16, 2008 at 2:24 PM, Martin Desruisseaux > <mar...@ge...> wrote: >> >> Hello all >> >> This is true that the current NetCDF image reader has limitation regarding its >> generality. We are aware of them and are slowly working toward some fixes. The >> current work (which I believe is a necessary step before we can improve NetCDF- >> like readers) is to get a good structure of GeographicMetadata for coverage, >> using "GML in JPEG 2000" as an inspiration. Cedric worked on that recently (one >> or two week ago) together with Daniele from Geosolution, but we are not yet done. >> >> Martin >> >> > >> > > > > -- > -------------------------------------------------------------- > Dr Jon Blower Tel: +44 118 378 5213 (direct line) > Technical Director Tel: +44 118 378 8741 (ESSC) > Reading e-Science Centre Fax: +44 118 378 6413 > ESSC Email: j.d...@re... > University of Reading > 3 Earley Gate > Reading RG6 6AL, UK > -------------------------------------------------------------- > > --~--~---------~--~----~------------~-------~--~----~ > You received this message because you are subscribed to the Google Groups "GeoShaver" group. > To post to this group, send email to geo...@go... > To unsubscribe from this group, send email to geo...@go... > For more options, visit this group at http://groups.google.co.uk/group/geoshaver?hl=en-GB > -~----------~----~----~----~------~----~------~--~--- > > -- ------------------------------------------------------- Eng. Simone Giannecchini President /CEO GeoSolutions S.A.S. Via Carignoni 51 55041 Camaiore (LU) Italy phone: +39 0584983027 fax: +39 0584983027 mob: +39 333 8128928 http://www.geo-solutions.it ------------------------------------------------------- |