[ANN] GeoTIFF.jl

juliohm · December 10, 2024, 7:38pm

Load and save GeoTIFF files in native Julia with GeoTIFF.jl

The package is developed on top of the incredible TiffImages.jl package by @tlnagy

Examples of usage in the README:

Palli · December 10, 2024, 11:25pm

Great! It occurred to me, maybe GeoJPEG exists, and is newer and more used, but it’s the opposite:

While GeoJPEG has generally been supplanted by GeoTIFF, it is supported for both export and import by Koordinates.

Do you know if it or some other lossy compressed format is better and more used, and should be supported too?

I see TIFF actually has JPEG support already as an extension though only rarely implemented (same for JPEG XL extension). Despite seeing here I don’t think that package (thus not yet yours) supports JPEG:

github.com

tlnagy/TiffImages.jl/blob/f4d285b3a7e426afb0a63969701ab38b5c75287f/src/enum.jl#L195-L209


      
          # Tags 512-521 are obsoleted by Technical Note #2 which specifies a
          # revised JPEG-in-TIFF scheme.
          
          	JPEGPROC = 512 			 #  !JPEG processing algorithm
          #define	    JPEGPROC_BASELINE		1	/* !baseline sequential */
          #define	    JPEGPROC_LOSSLESS		14	/* !Huffman coded lossless */
          	JPEGIFOFFSET = 513 			 #  !pointer to SOI marker
          	JPEGIFBYTECOUNT = 514 			 #  !JFIF stream length
          	JPEGRESTARTINTERVAL = 515 			 #  !restart interval length
          	JPEGLOSSLESSPREDICTORS = 517 			 #  !lossless proc predictor
          	JPEGPOINTTRANSFORM = 518 			 #  !lossless point transform
          	JPEGQTABLES = 519 			 #  !Q matrix offsets
          	JPEGDCTABLES = 520 			 #  !DCT table offsets
          	JPEGACTABLES = 521 			 #  !AC coefficient offsets
          	YCBCRCOEFFICIENTS = 529 			 #  !RGB -> YCbCr transform