[OSM-dev] "Deep History" App

Ian Dees ian.dees at gmail.com
Tue Sep 15 19:05:33 BST 2009


On Tue, Sep 15, 2009 at 1:01 PM, Tom Hughes <tom at compton.nu> wrote:

> On 15/09/09 18:49, Ian Dees wrote:
>
>  Next up are ways. This is pretty difficult, though, as a way's history
>> only shows the nodes that made up the way at that time, not which
>> revision of those nodes made up the way at the time. Is there a solution
>> for this or do I really need to get the full history for every node in a
>> way in order to see where the node was at given point in time?
>>
>
> No, because the server literally doesn't know - we don't record the version
> number of a node that is part of a way as it would mean the way had to be
> updated every time a node was changed.
>
> The only way you can do it is by matching up timestamps.
>
>
Ok, next question: is there a way to fetch full history for more than one
node at a time? I'd prefer to not have to either (a) download and parse the
full planet or (b) make tons of node/history queries to the main API server.
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