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September 2004
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2004.09.17 13:20 "Re: BigTIFF Tag Value Count issue", by Rob Tillaart
Joris wrote: > > > Primary signalling, but I prefer opt. 3 > > Noted. > > > The Number of values must be U64 too as my tag might describe an > > additional value for every pixel of the image. And as the image can be > > 4gig. this array will too. > > Shouldn't an extra channel be used to encode this data, instead of a tag? The > mechanisms for the encoding of the raster is already there, outside of the tag > mechanism. Otherwise, sooner or later, you'll end up wanting to tile/strip your > tag data and whatnot. I expect that will be sooner as one wants to keep 'fluxdata' in sync with the image-data. However in o0ption 3 the number of tags grows to 4G, so extra tags for "fluxtiled" and "fluxstriped" is not the problem. As I have not much experience with additional channels, I trust you that an extra channel could also solve the example. The example was to show the added value of a bigger 4-byte "TAG-space". regards, rob