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opengisch / OSGeo4A

OSGeo4A is a build environment to cross-compile opensource GIS software for android devices
MIT License
30 stars 22 forks source link

geotiff with jpeg compression #52

Open felix-ht opened 4 years ago

felix-ht commented 4 years ago

geotiff with jpeg compression is not implemented yet. (https://qfield.org/docs/project-management/dataformat.html)

It there a plan to add this feature?

m-kuhn commented 4 years ago

That would be really nice to have. No one committed to it yet.

edips commented 4 years ago

ECW support would be also very nice. There is a license restriction. QGIS for Linux doesn't include ECW. gvSIG software includes ECW, both of them are open source. I like ECW format because it is faster than GeoTIFF and it compresses very well. I converted 1GB ECW to GeoTIFF, it became 30GB.

m-kuhn commented 4 years ago

ECW is desirable as well, but linked to questionable licensing.

Did you by any chance compare a JPEG2K compressed GeoTiff to ECW? (An uncompressed GeoTiff will be bigger than virtually anything else, so another comparison might be more robust).

We are open to explore possibilities to ship OSGeo4A (and QField) with ECW or JPEG2K anytime. If you are interested in pushing support for more file formats, please contact us officially (info@opengis.ch).

edips commented 4 years ago

I don't know about JPEG2K. I converted ECW to GeoTIFF using gvSIG, it was probably uncompressed output. I would like to contribute about new file formats for OSGeo4A. If I explore something new about building ECW or other formats, I will contact you.