Andrea,
I'm not currently a user of the grid coverage reader, but I might at some
point. Skimming the proposal I was wondering:
1) Why you offer the getMetadataNames(coverage,...) and
getMetadataValues(coverage,...) on GridCoverageReader instead of handling
them on GridCoverage.
2) Similarly, why is the new GridCoverage2DReader interface on
GridCoverageReader instead of offering that interface on the GridCoverage.
I'm guessing it is assumed the reader can provide some overall information
cheaply while it is assumed that the read() operation returning a
GridCoverage is expensive. But it *feels* like an awkward arrangement.
Not surprisingly your proposal is loosely similar to the handling of
"subdatasets" in GDAL though in GDAL there is no distinct concept of a
reader. It is just that a dataset can have subdatasets and that for
container formats like HDF the base dataset might not have any actual grid
coverage associated with it (ie. zero bands).
Best regards,
Frank
On Wed, May 8, 2013 at 8:34 AM, Andrea Aime <andrea.a...@geo-solutions.it>wrote:
> Hi all,
> here is our overhauled proposal for multicoverage grid readers:
>
> http://docs.codehaus.org/display/GEOTOOLS/Efficient+support+for+multiple+coverages+in+GridCoverageReader
>
> This proposal allows to break the 1-1 relationship between reader and
> coverage, and allows proper support for multicoverage sources, such as
> spatial databases, ArcSDE, NetCDF (often they contain more than one
> coverage per file).
>
> Feedback, questions, and votes welcomed :-)
>
> Cheers
> Andrea
>
> --
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>
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---------------------------------------+--------------------------------------
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and watch the world go round - Rush | Geospatial Software Developer
------------------------------------------------------------------------------
Learn Graph Databases - Download FREE O'Reilly Book
"Graph Databases" is the definitive new guide to graph databases and
their applications. This 200-page book is written by three acclaimed
leaders in the field. The early access version is available now.
Download your free book today! http://p.sf.net/sfu/neotech_d2d_may
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