On 10/05/2010, at 8:21 PM, Jon Britton wrote:

> Hi,
> 
> I'm currently using the 52North Web Processing Service for raster processing. 
>  I've got some basic processes which take a GeoTiff as input.  Everything 
> used to work fine, but at some point it's broken.  I've posted on the 52North 
> list and they think it's a problem with GeoTools.  

That is likely - the module is unsupported and there were not a lot of WPS 
servers around when it was written.

> The WPS is getting a GeoTiff from my local Web Coverage Service (GeoServer).  
> I'm using the data that ships with GeoServer (nurc:Arc_Sample).  Here is the 
> request (which successfully returns a GeoTiff):
> 
> http://localhost:8080/geoserver/wcs?service=WCS&version=1.0.0&request=GetCoverage&coverage=nurc:Arc_Sample&bbox=-163.4765625,-77.87109375,137.4609375,62.05078125&crs=EPSG:4326&format=geotiff&width=800&height=800
> 
> The WPS then trying to great a GridCoverage2D out of it using these lines:
> 
> reader = new GeoTiffReader(tempFile, hints);
> GridCoverage2D coverage = (GridCoverage2D) reader.read(null);   // 
> AbstractGeoTiffParser.java line 50 (see exception)
> 
> This part fails and I get the following exception report:
...snip...
> So, I'm wondering if this is a problem with the GeoTiff generated by 
> GeoServer (it seems to work ok in QGIS) or is it a problem with the GeoTools 
> GeoTiff reader?   

Can you try saving the geotiff to disk and using it in the ImageLab example? 
Just to see if geotools is good with it or not?

> I've tried using a dataset which didn't ship with GeoServer (a Landsat 
> GeoTiff) and it works fine.  The WPS seems to be using GeoTools 2.4.2 and I'm 
> using the latest GeoServer release (2.0.1 I think?).

Correct; 52N is using an old version of GeoTools; perhaps some GeoTiff fixes 
have occurred since then?

> 
> Thanks,
> 
> Jon
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