Overpass API developpement

[mmd <>]

Hi,

Am 04.11.2015 um 22:12 schrieb michael spreng:
> Hi
> 
> On 04/11/15 21:51, mmd wrote:
>> Set up database update using hourly diffs. For August 1st 2015, this
>> should be based on the following file (+/- 1 error margin).
>>
>> http://planet.osm.ch/replication/hour/000/020/173.state.txt
> 
> That requires me the have properly cut diffs for all of the history I
> want to provide. And ideally I would like to provide the full history.
> But We only started with the diffs in April 2013.

Ok, I see your point.

> 
> Could I import an ancient extract and then apply the full history dump
> as a diff maybe?

I suspect that this requires quite a bit of much memory:

osmconvert switzerland-padded-softcut.osh.pbf --out-osc | wc -c
16601638809

osmium has some option for time-filter to create a history file based on
a from and to-timestamp.

   osmium time-filter [OPTIONS] INPUT-FILE FROM-TIME TO-TIME

Maybe this could be used to create a small history file for each day
(based on switzerland-padded-softcut.osh.pbf), and then use osmconvert
--out-osc just to create a diff for this day and ran update_database on it.

I have no idea if this works, though.


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