Hello,

I use the ImageMosaicJDBC plugin to connect to raster data stored in an
oracle DB and WMS to visualize it. For my test I used the original BBOX and
height/width of the GeoTIFF image, so no interpolation should be necessary
(nevertheless I tried all 3). I compared the result with a WMS request based
on the image stored in the file system. When I zoom in the pixels are
clearly different, it looks like the resolution is a bit lower with
ImageMosaicJDBC and shifted too.

I also used WCS to confirm that the image is stored without any information
loss in the oracle database.

.) WMS request with GeoTIFF in file system
<http://osgeo-org.1560.x6.nabble.com/file/n5262463/file.png> 
--> identical with original GeoTIFF

.) WMS request with GeoTIFF in oracle with ImageMosaicJDBC plugin
<http://osgeo-org.1560.x6.nabble.com/file/n5262463/plugin.png> 
--> Quite different to the original GeoTIFF

.) WCS request with GeoTIFF in oracle
--> I get the original GeoTIFF so the image is correctly stored in the
database

Does anyone know why ImageMosaicJDBC returns a different image, although
epsg code, bbox, widh, height are exactly the same?

Thanks!




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