It works for me (using tiny-osmpbf [0]): I see 2228689 "visible" and 160919 deleted node versions. Maybe osm4j doesn't read the visible flag from the DenseInfo[1] data structure in the pbf file?
Best, Martin [0] https://www.npmjs.com/package/tiny-osmpbf [1] https://wiki.openstreetmap.org/wiki/PBF_Format#Nodes On Tue, Feb 21, 2017 at 9:56 AM, Sebastian Kürten <sebastian.kuer...@fu-berlin.de> wrote: > Hi, > > I took this as an opportunity to check osm4j's support for history > files. From what I understand the main difference to ordinary data files > is that elements with the same id appear multiple times and they carry > the 'visible' attribute. During testing I noted that I would not find > any nodes with the visibility set to false, which appears strange to > me? Can this be true, or is there likely something wrong with either > the data or the code that processes it? > > I've set up a minimal example that counts and sums up the visibility of > each entity type in Bremen: > > https://github.com/topobyte/osm4j-examples/blob/master/src/main/java/de/topobyte/osm4j/examples/history/HistoryVisibilityStats.java > > Here's the output: > > nodes: 2389608 visible, 0 invisible > ways: 729714 visible, 27604 invisible > relations: 67500 visible, 1632 invisible > > The data file used is this: > http://download.geofabrik.de/europe/germany/bremen.osh.pbf > > Thank you for any hints, > Sebastian > > On Mon, 20 Feb 2017 01:18:00 +0100 > Frederik Ramm <frede...@remote.org> wrote: > >> Hi, >> >> "full history" files are kind of a niche interest, but they can be >> useful to analyze some things like "how many different people have >> added a certain tag", or "how has an object evolved over time", and >> so on. They can also be used to reconstruct the complete data set for >> any given timestamp in the past (minus, of course, redactions). >> >> I'm happy to announce that the Geofabrik download server now has full >> history files for all regions served. These files (called ".osh.pbf") >> can for example be processed with the Osmium library and the osmium >> command line tool. If you want to run analyses on them without C++ >> coding, Osmium can convert them to a text-based format ("OPL") that is >> then accessible for grep et al. >> >> The full history files will be updated weekly. >> >> Bye >> Frederik >> > > _______________________________________________ > dev mailing list > dev@openstreetmap.org > https://lists.openstreetmap.org/listinfo/dev _______________________________________________ dev mailing list dev@openstreetmap.org https://lists.openstreetmap.org/listinfo/dev
