Can't unlong TagSampleFormat in decodeTiff about juicy.pixels HOT 7 CLOSED

Hi, do you have a sample image?

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You can get one from the URL below.

http://wcs.geonorge.no/skwms1/wcs.dtm?SERVICE=WCS&VERSION=1.0.0&REQUEST=GetCoverage&FORMAT=GeoTIFF&COVERAGE=bathymetry50m&BBOX=296350,7429950,1156300,8117350&CRS=EPSG:32633&WIDTH=800&HEIGHT=600

It should be a 32 bit GeoTIFF, which contains some extra tags for georeferencing, so the error message did not come unexpected. I'm just trying to identify what the parsing process actually stumbles over, to see if it can be helped.

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After a quick glance, the image causes various distinct problems in the Tiff parser, I'm going to look after it.

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I've pushed a fix to handle 32bits int monochrome picture, I reduced pixel depth to 16 bits. Is this ok or do you need the full values of the 32bits?

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Awesome! Thanks a lot. That was quick.

Technically the 32bit may be used, since the TIFF is just a container format for arbitrary data in a raster arrangement (temperature data, elevation data in the example, etc.). That said most applications scale the data to the range that is actually used after loading anyway, so this helps a lot.

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I am wondering, is there other color spaces used for these kind of images? I was thinking of RGB/RGBA. If these images are restricted to monochrome, I may add support for them and loading/saving them from Tiff.

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I think that's a semi-safe assumption.

The specification is here: http://www.remotesensing.org/geotiff/spec/contents.html and should be fully Tiff 6.0 compatible.

In practice, I have only seen either "grayscale" raster data, or regular georeferenced images which make use of the RGB* space (you could georeference a scan of a map for example). The latter won't use 32bit. The spec won't prohibit you from using 32bit RGBA for several data layers, but the software I know wouldn't expect data to be layered like this.

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