Hi!
The PBF format has maximum block sizes. Osmium used to just write 8000 objects
into each block and hope that there is enough space. Turns out that there are
cases where that doesn't work. If there are a lot of very large relations, the
block can overflow. Somebody noticed that problem and
: Jochen Topf joc...@remote.org
An: dev@openstreetmap.org
Betreff: [OSM-dev] Writing PBF
Hi!
The PBF format has maximum block sizes. Osmium used to just write 8000
objects
into each block and hope that there is enough space. Turns out that there
are
cases where that doesn't work
On Tue, Dec 13, 2011 at 12:39:55PM +0100, mar...@gmx.eu wrote:
If you limit the number of objects only to maximum block size (32 MiB), you
will get smaller PBF files. I noticed this effect when writing the PBF-write
module for osmconvert. The files are much smaller although I did not care
Am 13.12.2011 15:04, schrieb Jochen Topf:
Has anybody any data on how much smaller the files get with sorted vs. unsorted
string table? Sorting the string table means there is a lot more work and a lot
more main memory needed for the PBF writer.
I encountered shrinkage of around 1-2% of the
objects/block (download file)
- n objects/block, but 30..31 MB/block (osmconvert)
saves about 5% file size.
Markus
Original-Nachricht
Datum: Tue, 13 Dec 2011 16:39:00 +0100
Von: Peter Körner osm-li...@mazdermind.de
An: dev@openstreetmap.org
Betreff: Re: [OSM-dev] Writing PBF
Am
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