Hi WanMil, I am still busy rewriting all the boundary code to allow reading bnd data from zip. Most of it is done, and I also found a few errors contained in my patch boundary_prep_quadtree_v2.patch I have now a version that can read old bnd format, new quadtree bnd file format, both from zip or normal directory, and its BoundaryQuadtree delivers the same results as the version in the performance branch. I did not see a big difference between reading from zip or directory, I think that is okay. I did not see any multi-threading problems while reading from zip, so I did not code anything special for this. You mentioned such problems, did you mean updating zip files? I don't think that we need a routine to write / create zip files, do we? I think we need a utility similar to BoundaryMerger to allow creating the bnd files for planet in multiple steps, so that's what I am working on now. Gerd -- View this message in context: http://gis.19327.n5.nabble.com/Precompiled-boundary-files-in-one-zip-file-tp... Sent from the Mkgmap Development mailing list archive at Nabble.com.