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Hi John, > >>If we have the ability to store variable length "compressed formats", > >>then it seems like we can define some simple format for this, say a sequence > >> > >> n (int) > >> nbits (byte) > >> scale (float/double) > >> offset (float/double) > >> n nbit integers > >> > >>so that the compressed data is self contained, with no need for auxilary > >>variables or info stored outside the chunk. > >> > >> > > I thought you wanted the predefined scale/offset values to vary according > >to the chunk's location in the dataspace? > > > > > The above format would describe the compressed data format for one > chunk. So the scale, offset could vary for each chunk. > > I was proposing that we start with the case where the scale and offset > are automatically calculated by the compression filter. I think that > will be the most common case. > > Not sure if im missing something. This is fine for the "adaptive" case, but it's not sufficient for the "predefined" scale/offset that varies according to the coordinates of the chunk. If that's OK for now, then we won't have a problem. Quincey