Hi Andrea,
thanks, I tested using a single image and I indeed see the coverage names that
are returned by that method in geoserver.
Do you think it should be feasible for the mosaic to work with readers that are
not a StructuredGridCoverage2DReader? Do you think it should be feasible for me
to fix this, or would this require a lot of rewriting?
In the code of ImageMosaicWalker, I indeed found an instanceof check which
might indicate an unwanted dependency on the StructuredGridCoverage2DReader
interface:
String [] coverageNames = coverageReader.getGridCoverageNames();
CatalogBuilderConfiguration catalogConfig;
for (String cvName : coverageNames) {
final String inputCoverageName = cvName;
String coverageName = coverageReader instanceof StructuredGridCoverage2DReader
? inputCoverageName
: indexName;
Would you consider this unintended contamination a bug?
best regards,
Jeroen
On Wednesday 07 August 2013 10:14:42 Andrea Aime wrote:
On Wed, Aug 7, 2013 at 8:53 AM, Dries Jeroen
<[email protected]<mailto:[email protected]>> wrote:
Hi all,
I have an existing implementation of a BaseGDALGridCoverage2DReader that
supports HDF5 images through the GDAL library. (It depends on custom metadata,
so it's not usable in a broader context.) The only downside is that it can only
read one of the bands in the HDF5 image file, while GDAL actually supports any
band.
Using this reader, I managed to used the Image Mosaic plugin to create an HDF5
based mosaic out of multiple HDF5 files, which is than exported by geoserver.
In fact, the implementation turned out to be pretty simple, so thanks for that!
I noticed that geotools 10 should from now on also support exposing the other
bands in the image. So I implemented some of the new methods like
GridCoverageReader:getGridCoverageNames() to expose more coverages inside the
single image. These however do not seem to show up in Geoserver. Can anyone
give me some pointers about what should certainly be implemented for this to
work? (I hope this is not a geoserver question, as it seems that it is the
imagemosaic module that should notice that there are multiple coverages
available.)
I already noticed that the experimental NetCDFReader also implements
StructuredGridCoverage2DReader, but it seems that this would make my
implementation a lot more complex.
Did you implement the getGridCoverageNames method? I believe that's what
GeoServer uses to show the GUI.
Does it work if you try to configure the single HDF5 file?
But yes, it may well be that there is some unintended contamination with
StructuredGridCoverage2DReader, while we do not
mandate implementing that interface for multi-coverage data, the reality is
that right now all officially supported multi-coverage
sources also do implement that interface (netcdf, image mosaic) so there might
be some unintended hiccup along the way (either
in the mosaic, or in geoserver), and the only mosaic of multiple coverages that
we tested is the netcdf one.
Cheers
Andrea
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