Brad Hards <bradh <at> frogmouth.net> writes: > > On Fri, 7 Aug 2015 11:17:56 AM Jukka Rahkonen wrote: > > NITF requires either that the tile size must not be > > bigger that 1024x1024, or that the whole file is written as one single tile. > > I believe you have such single-tile NITF file.
> I don't believe this is true (at least in NITF 2.1 - MIL-STD-2500C) for two > reasons: > 1. Tiling is mandatory above 8192 x 8192 (See Table A-10 Complexity Level 7 or > higher) > 2. Tiles are allowed to be up to 2048 x 2048 (Complexity level 3) or 8192 x > 8192 (Complexity level 5 or higher). Hi Brad, I read the NITF 2.1 - MIL-STD-2500C http://www.gwg.nga.mil/ntb/baseline/docs/2500c/2500C.pdf in the same way than you do. However, I wrote my comments after reading another (older) document: "NATIONAL IMAGERY TRANSMISSION FORMAT (NITF) VERSION 2.1 COMMERCIAL DATASET REQUIREMENTS DOCUMENT (NCDRD)" http://www.gwg.nga.mil/ntb/baseline/docs/stdi0006/NCDRD_18February2010.pdf And especially part 2.3.2 JPEG 2000 Image Geometry Segmentation Commercial datasets shall be organized in JPEG 2000 tiles as described in BPJ2K01.00 Section 8. I believe that the referred document is this: http://www.gwg.nga.mil/ntb/baseline/docs/bpj2k01/ISOJ2K_profile.pdf Appendix C JPEG 2000 Commercial Profiles (ISO/IEC IS 15444-1 Annex A.10) , Table C-1. Codestream Restrictions: Profile-0: Tiles of a dimension 128x128: YTsiz=XTsiz=128 or one tile for the whole image: YTsiz+YTOsiz>=Ysiz XTsiz+XTOsiz>=Xsiz Profile-1 XTsiz/min(XRsiz, YRsiz)<=1024 XTsiz=YTsiz or one tile for the whole image: YTsiz+YTOsiz>=Ysiz XTsiz+XTOsiz>=Xsiz It may be that tiling is mandatory for images bigger than 8192 x 8192 because of the baseline standard. On the other hand is seems that commercial vendors are not allowed to use multiple tiles if they are larger than 1024 x 1024. I did not dig too deep into the black hole between 1024 x 1024 and 8192 x 8192. BTW. In the Inspire guidelines for orthoimagery the same "one tile or max 1024 x 1024 tiles regulations in http://inspire.ec.europa.eu/documents/Data_Specifications/INSPIRE_DataSpecification_OI_v3.0.pdf: "JPEG 2000 allows internal tiling within the codestream. Profile 1 of ISO 15444 - 1 already requires no tiling (i.e. the image = 1 tile) or tiling with tiles size [no] bigger than 1024x1024 pixels. There is no further requirement" I have added [no] into the quotation. The Inspire text does not have the word which makes the the sentence to mean the opposite but it must be a typo. See comment 8 in https://trac.osgeo.org/gdal/ticket/5697. -Jukka Rahkonen- _______________________________________________ gdal-dev mailing list gdal-dev@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/gdal-dev
