[OSM-dev] Fwd: Script to extract bbox from history planet
frederik at remote.org
Thu Dec 16 08:22:21 GMT 2010
I have made a small Perl script that allows you to extract a
bounding box from the history planet file. It's very basic (no
"completeWays"/"completeRelations" mode, i.e. trouble at the edges of
your bbox) and dreadfully slow (about 10 hours to process the whole
file) but it's a start. It doesn't use a lot of memory so should be
runnable by anybody.
If someone feels like (a) re-implementing this in C or (b) enhancing
Osmosis to be able to deal with history files, that would of course be
the "proper" way to do it. My solution is just a quick hack to extract
an area of interest for further processing.
I haven't tested it thoroughly but made some spot checks and it seems to
work all right, including proper handling of object deletion (i.e.
includes the last "visible=false" version if an object gets deleted).
It's at applications/utils/osm-extract/history-excerpt.pl in our SVN.
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