Does the ImageIO-ext project have a lost, should really be speaking with that crew.
On Wed, Sep 18, 2019 at 5:26 PM Josh Fix via GeoTools-Devel < geotools-devel@lists.sourceforge.net> wrote: > I'm in the process of merging my pure JAVA COG reader code into > imageio-ext. Because I'm extending TIFFImageReader and reusing all of the > existing TIFF codebase, is it preferred that I create a "cog" package under > it.geosolutions.imageioimpl.plugins.tiff in the tiff plugin module, or > should I create an entirely new cog plugin module? > > On Mon, Sep 9, 2019 at 8:59 AM Josh Fix <j...@federal.planet.com> wrote: > >> Hey all, just wanted to share some progress. >> >> I created a project that is capable of asynchronously reading COG tiles. >> It extends TIFFImageReader and overrides the read method to build a >> collection of information for all tiles that need to be read, then >> determines the byte ranges for groups of contiguous tiles. The tiles are >> read using HTTP range requests and stored in-memory via an ImageInputStream >> implementation that simply uses a MemoryCacheImageInputStream as a >> delegate. Additionally, the project provides a caching image input stream >> that uses ehcache to cache each tile. I would eventually like to expand >> this to support various cloud platform backends (implementing the >> RangeReader interface), but for now it's just HTTP. I can provide more >> info/details if desired. The repository is available here: >> >> https://github.com/joshfix/cog-image-reader >> >> Additionally, I have a project that is basically copied from the >> s3-geotiff project, but implements the Azure library to read from Azure >> blob storage: >> >> https://github.com/joshfix/azure-geotiff >> >> And finally, a GDAL-based reader that accepts VFS paths. This project >> cherry picks (and thus duplicates) a lot of code from a lot of places in >> GeoTools and imageio-ext, so contributing this might be ugly. It works on >> its own, but when used to build mosaics, there seem to be >> nodata/transparency issues. It is available here: >> >> https://github.com/joshfix/gdal-vfs-reader >> >> Any feedback would be appreciated, and I'd be happy to contribute >> anything that the community might be interested in. >> >> Josh >> > > > -- > Josh Fix > Systems Architect > Planet Federal > j...@federal.planet.com > +1 321.444.0412 > _______________________________________________ > GeoTools-Devel mailing list > GeoTools-Devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/geotools-devel > -- -- Jody Garnett
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