Re: [udig-devel] How to add a coverage layer in code?

[Graham Davis <gdavis@xxxxxxxxxxxxxxx>]

Sorry, missed your email earlier Andrea.  I wasn't able to do exactly 
what I wanted.  I ended up writing the coverage to a TIF file and then 
loading the file as a layer.  A bit of a round about solution, but it 
worked well enough for my needs.

Jody's response makes sense.  The temporary resource was only working 
for FeatureTypes before.

Graham.


Jody Garnett wrote:
> The concept of "temporary resource" has its own extension-point; looks 
> like you can add a placeholder for an in memory grid coverage; right 
> now I just see a single implementation for turning a FeatureType into 
> a temporary MemoryDataStore.
>
> What would a good descriptor be in this case? Probably a 
> GridCoverage2D (I think that is the in memory implementation of grid 
> coverage is it not).
>
> Cheers,
> Jody
>
> On Mon, Jan 12, 2009 at 1:07 AM, andrea antonello 
> <andrea.antonello@xxxxxxxxx <mailto:andrea.antonello@xxxxxxxxx>> wrote:
>
>     Hi Graham,
>     were you able to solve this?
>
>     > I have a coverage object I've created in code by resampling an
>     image.  I
>     > want to place this coverage on the map as a layer.  I can't seem
>     to find any
>     > examples of how to add a coverage object as a layer.  I've seen
>     this:
>     >
>     > IGeoResource resource =
>     >
>     CatalogPlugin.getDefault().getLocalCatalog().createTemporaryResource(descriptor);
>     >
>     > ApplicationGIS.addLayersToMap(map,
>     Collections.singletonList(resource), -1);
>     >
>     > But I don't know what descriptor is in relation to my coverage
>     object, or if
>     > this will even work for what I'm trying to do.
>
>     I assume you could have a look at the geotiff service implementation.
>     In the GeoTiffServiceExtension class the service is created.
>
>     >From a quick (very quick) look at extractId:
>        private URL extractID( Map<String, Serializable> params ) {
>            URL id;
>            if (params.containsKey(URL_PARAM)) {
>                Object param = params.get(URL_PARAM);
>     ...
>
>
>     it looks to me that the url should be enough.
>
>     Humpf, now I see your point, you have an in memory thing? Is that the
>     real problem?
>
>     Andrea
>
>
>
>     >
>     > --
>     > Graham Davis
>     > Refractions Research Inc.
>     > gdavis@xxxxxxxxxxxxxxx <mailto:gdavis@xxxxxxxxxxxxxxx>
>     >
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--
Graham Davis
Refractions Research Inc.
gdavis@xxxxxxxxxxxxxxx