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Origin of changesets for contributions made prior to API 0.6

Hi, I understand that the concept of changeset appeared with API 0.6 in April 2009. However, when querying the API, changesets exist prior to this date.

How did these changesets created?
How did the information they contain retrieved?

Thanks

changesets api database

asked 23 Mar '17, 18:49

jfd553
389●20●23●32
accept rate: 0%

One Answer:

If you can read C++, the code that was carried out to "migrate" the database from its original form to one with changesets is at https://svn.openstreetmap.org/applications/utils/misc/api06_migrate/. Specifically:

the main logic is in https://svn.openstreetmap.org/applications/utils/misc/api06_migrate/changeset_synth.cpp
the rules are explained in https://svn.openstreetmap.org/applications/utils/misc/api06_migrate/README.WARNING: changesets were synthesised from existing edits with "idle time 1 hour, no changeset lasts longer than 24 hours, no changeset contains more than 50,000 changes"

answered 23 Mar '17, 19:27

Richard ♦
30.9k●44●279●412
accept rate: 18%

edited 23 Mar '17, 19:28

Thanks! I should be able to read the code. Anyway, the basic logic of applying changesets' capabilities on each users' edits is clever :-)

(23 Mar '17, 21:05) jfd553