[OSM-dev] database history

[Martin Koppenhoefer]

2009/1/6 D Tucny <d at tucny.com>

> 2009/1/6 Martin Koppenhoefer <dieterdreist at gmail.com>
>
>> I was looking on the history of this way:
>>
>> http://www.openstreetmap.org/api/0.5/way/23322317/history
>>
>> and found, that the first 3 are completely the same (beside that the first
>> entry and No. 2 and 3 have a different created by-tag), or am I missing
>> something? Is this a case that can be found more often?
>>
>
> If you have a look at the nodes in the way, some of them changed
> position... If I recall correctly, potlatch, the online editor save a new
> version of the way, and potentially all nodes within it, if any part of the
> way is modified... In this case, only changes to node positions occurred
> between the second and third versions being saved...
> Specifically, this node
> http://www.openstreetmap.org/api/0.5/node/252528351/history
>
> d
>
>
ah, now I understand. Is this behaviour still in the actual versions? It
creates lots of history-data for ways that didn't change (just for moving 1
node the whole way is resaved, which itself doesn't even differ, imagine
this for a big way with some hundred nodes).

Martin
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