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 <jdb@anonymised.com> 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
<martin.desruisseaux@anonymised.com> 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
>
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University of Reading
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