On Tue, May 3, 2011 at 12:48 PM, Peter Körner <osm-li...@mazdermind.de>wrote:
> Am 02.05.2011 17:38, schrieb Frederik Ramm: > > Hi, >> >> Martijn van Exel wrote: >> >>> Revisiting this old thread. I seem to remember this script was >>> superseded / made obsolete by something else, but can't find what / >>> where. >>> >> >> Hi > > I just finished the first stage of my history splitter. It two splitting > modes of which one is finished. > > The "hard cut" mode features: > - single pass > - if an object is in the extract, all versions of it are there > - keeps the "visible" attribute > - ways are cropped at bbox boundaries > - relations contain only members that exist in the file > - ways and relations are reference-complete > - needs only 170 MB RAM per BBOX > > It's based on the osmium framework. Building it is a little complicated, as > I have made changes to the osmium framework that are not yet merged into the > main development line, but I'm in contact with jochen about this. > > You need > - the xml_tree branch of my osmium version: > <https://github.com/MaZderMind/osmium/tree/xml_output> > run: git clone g...@github.com:MaZderMind/osmium.git > git checkout xml_output > > - all prequisites mentioned in the readme file at > <https://github.com/MaZderMind/osmium/tree/xml_output> > > - the splitter itsself > > < > https://github.com/MaZderMind/OpenStreetMap-History-API/tree/master/splitter > > > > and run it like that: > bzcat path/to/full/history.osm.bz2 | ./splitter - example.config > > this runs the above mentioned "hard cut" algorithm that changes ways and > relations to be completely inside the box. You can read about the algorithm > its features and disadvantages here: < > https://github.com/MaZderMind/OpenStreetMap-History-API/blob/master/splitter/hardcut.hpp > > > > In the next step I'll implement the "soft cut" algorithm that keeps ways > completed (you can read about it here: < > https://github.com/MaZderMind/OpenStreetMap-History-API/blob/master/splitter/softcut.hpp > >). > > I'll try to provide several extracts in different sizes for the Hack > Weekend in Essen. > > Peter > Peter -- great, I'm trying this to generate an extract of Amsterdam from the full history planet. I don't mind hard cut for now. Did everyone notice there is a new full history planet available by the way? Thanks Matt (I suppose you did this again). Martijn -- Martijn van Exel http://about.me/mvexel
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