I am using another library to read elevation data from GeoTiff files and it works fine with tiled files but I can't obtain the elevation data from either stripped or scanline-based files especially the ones downloaded from Nasa .

any idea how to do that?

Hi Loïc, That's what I've ended up doing; using LibTiff.NET to take my GdPicture output and convert the encoding scheme. It's all working now, thanks for a great product. how did you managed to read the elevation data? i have the same problem and the tiles are always null can you give a hint please?