Hi
I'm working heavily with the full-history-dumps. Lately I wrote a
splitter [1] that allows splitting the full-history-dump into smaller
extracts and I plan to publish some of the extracts on a GWDG mirror.
Right now the splitter uses osmium as Framework, because its xml-reader
passes the visible-flag along through the pipeline. The xml-writer I
wrote for osmium [2] is also able to write the visible-flag out.
But actually it would be nice to let the whole xml-bz2-thing be and use
our new cool pbf stuff. But unfortunately the pbf format does not
support saving the visible-flag, which is really important when working
with the history.
I talked with Jochen Topf about the extensibility of out pbf-format and
he anticipated problems with the DenseInfo message. So my questions are:
- is it possible for an app like my splitter to add a boolean
visible-flag to nodes, ways and relations in a pbf file, so that
other apps like osmosis can still read the generated pbf file (just
ignoring the visible flag)
- if not: is it feasible to release a new version of the pbf
definition, that contains a boolean visible-flag
- if not: how could a pbf-file generated with the visible-flag but
incompatible with common apps like osmosis be named, to clearly show
that it's NO .osm.pbf file? (eg. germany.hosm.pbf or
germany.osm.history.pbf or ..)
Peter
[1]
<https://github.com/MaZderMind/OpenStreetMap-History-API/tree/master/splitter>
[2] <https://github.com/MaZderMind/osmium/tree/xml_output>
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