[OSM-dev] release of full-history extracts

[Peter Körner]

Hi

I uploaded a new charge of history extracts, based on the 110919 full 
history dump. They have been created from the latest 
full-experimental-dump [1] using my history splitter [2], based on a 
slightly modified version of Jochen Topfs really great osmium framework 
[3]. They contain multiple versions of an object. If you just want the 
map-data as it is currently, use the Geofabrik-Extracts [4].

The extracts can be downloaded from gwdg:

<http://ftp5.gwdg.de/pub/misc/openstreetmap/osm-full-history-extracts/110919/>

Their size ranges from very small (a village) via medium (Berlin) to 
large (Germany). They only cover a very, very small part of the world 
and are currently targeted at application developers that are looking 
for data to test their history analysis apps. Most extracts are 
delivered as .osh.pbf files, readable with all history-enabled pbf 
parsers (eg. osmium).

Some extracts are also available in the .osh or .osh.bz2 format 
(xml-basesd). Some common programs like JOSM can open them them when you 
rename them to .osm, but the produced output is not very useful in most 
cases.

In contrast to the last set of extracts, the new ones are now cuttet 
using the softcut algorithm [6] using simple bounding-boxes [5].

Dumps created using that algorithm have the following characteristics:
  - ways are complete (as they are in the api-database)
  - ways are reference-complete (all referenced points are included)

  - relations are complete (as they are in the api-database)
  - relations are NOT reference-complete (relations may reference ways
    or nodes that are not in the extract)

  - relations referring to relations that come later in the file are
    included

  - all versions of an object of which one version touched the bbox are
    included

As always, I first created a .pbf version of the full-planet file, which 
I uploaded, too:

<http://ftp5.gwdg.de/pub/misc/openstreetmap/osm-full-history-extracts/full-planet-110919-1418.osh.pbf>


Peter



[1] 
<http://planet.osm.org/full-experimental/full-planet-110919-1418.osm.bz2>
[2] <https://github.com/MaZderMind/osm-history-splitter>
[3] <https://github.com/MaZderMind/osmium/>
[4] <http://download.geofabrik.de/>
[5] 
<http://ftp5.gwdg.de/pub/misc/openstreetmap/osm-full-history-extracts/bbox.config>
[6] 
<https://github.com/MaZderMind/OpenStreetMap-History-API/blob/0.1/splitter/softcut.hpp>