I'm writing a GeoTiff reader for GeoTrellis for Google Summer of Code. I have read in all tags and geokeys and now I'm working with the decoding process.
Currently the Tiff 6.0 spec recommends that baseline readers support the following decompressions:
- Uncompressed (duh)
And the extension recommends the support of:
- Jpeg (Old spec)
I have implemented all the baseline compression types and LZW but as I understand it the compression type 6 (Jpeg old spec) is deprecated and replaced by compression type 7 (new Jpeg). Except these compression types mentioned Deflate compression (compression type 8) is mentioned in an extension document by Adobe.
As I understand it nobody uses the old Jpeg compression, is there any common other compressions I should support? That isn't bound for a single reader/writer software brand? And I should implement the compression type 7 and 8?
The goal with the reader is to support as many GeoTiffs as possible.
For the interested the reader is written in the Scala programming language.