TIFF handling

[martindurant]

https://github.com/cgohlke/tifffile provides a way to get kerchunk references out of individual TIFF files and sometimes sequences (see long thread: cgohlke/tifffile#125). It also provides access to TIFF tags, which, for the case of GeoTIFF (or COG) will contain coordinates information. We should write a wrapper to persist these tags to the output and, optionally, generate appropriate coordinates.

[RichardScottOZ]

Yes, that sounds like a good idea.

[martindurant]

https://github.com/fsspec/kerchunk/blob/main/kerchunk/tiff.py

[martindurant]

Not documented and only lightly tested, but I believe it works. This was in #144.

@RichardScottOZ , if you want to play, it should do the same as what you were doing, except transfer the attributes too.

[RichardScottOZ]

Thanks Martin, will check it out shortly.

[martindurant]

(actually added it to the docs now too)