On Tue, Nov 30, 2010 at 10:53:16AM -0600, Scott Crosby wrote: > On Tue, Nov 30, 2010 at 2:21 AM, Jochen Topf <joc...@remote.org> wrote: > > The PBF format supports three compression types: zlib, lzma, and bzip2. Do > > we have to support all of them? What is the currently existing software > > using? > > Good question. I think that the bzip2 compression option is useless. > Too slow, especially on the decompression side. I'm not sure what to > do about LZMA. It offers higher compression ratio's at little loss in > decompression speed. The catch is that while everything supports > deflate, LZMA decompressor support is a lot less widespread. It might > be a valuable future option, but it is also untested. > > To my knowledge, Osmosis has the only implementation of a PBF writer, > it only uses uncompressed and zlib? Has anyone else implemented a > writer? > > If nobody else has their own writer, then would anyone object to me > unilaterally removing (not depreciating) bzip2 entirely, and > disabling/marking lzma as a proposed future extension? If tests in > the future show that LZMA offers significant size decreases, it can be > enabled and support can be added.
+1 Jochen -- Jochen Topf joc...@remote.org http://www.remote.org/jochen/ +49-721-388298 _______________________________________________ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
