Good guess, indeed that was the case. Thanks, Sebastian
On Tue, 21 Feb 2017 10:52:18 +0100 Martin Raifer <tyr....@gmail.com> wrote: > 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 _______________________________________________ dev mailing list dev@openstreetmap.org https://lists.openstreetmap.org/listinfo/dev
