[OSM-talk] undeleting ways?

Frederik Ramm frederik at remote.org
Sun Feb 8 09:26:38 GMT 2009


malenki wrote:
> Retrieve lost data with planetosm-excerpt-tags.pl and
> planetosm-excerpt-area.pl parsing an older worldfile (or better partly
> file, if exist) containing the deleted items. 


> Maybe there are other methods - I don't know them.

If you can find out the IDs of the "lost" objects then they can be 
retrieved through the API (with .../history). The trick is finding out 
which objects you want. If you know roughly when the deletion has taken 
place and/or by whom, then you can download the daily diff for the 
day(s) in question and find out which objects were deleted. The daily 
diffs are relatively small and easy to process even on a small machine, 
and there's a program called oscgrep.pl in SVN that will easily let you 
find things like "all node deletions by user X in this daily diff".


Frederik Ramm  ##  eMail frederik at remote.org  ##  N49°00'09" E008°23'33"

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