[OSM-talk] weeklyOSM #497 2020-01-21-2020-01-27

[Andy Townsend]

On 02/02/2020 16:39, Yuri Astrakhan wrote:
>
> * Anyone working on an evolving project like OpenMapTiles would attest 
> that the import schema constantly changes.

Indeed, but ...


> Every time schema changes, one needs to download newest planet, import 
> it based on the new schema, and run diffs from that point.
>
... that's why I said "... and there are ways of keeping a *.pbf* up to 
date" in my message. - the idea is to avoid large downloads wherever 
possible (emphasis new in this message; won't make it to plain text 
archive).

For more info see:

https://docs.osmcode.org/pyosmium/latest/tools_uptodate.html

or if that's somehow not an option:

https://wiki.openstreetmap.org/wiki/User:EdLoach#Osmosis_to_keep_a_local_copy_of_a_.osm_file_updated

(from a few years back)

> * Automation / easy adaptation.  Providing an out-of-the box way to 
> set up your own server is much easier if you have a tool that 
> automatically downloads and validates the planet file or a portion of it,

Sure - an automated process is much easier to follow than a manual 
do-it-yourself one, but the fact that a process is automated doesn't 
mean that it has to be wasteful.  Ultimately, someone's paying for the 
bandwidth that downloads from each of the mirrors at 
https://wiki.openstreetmap.org/wiki/Planet.osm#Planet.osm_mirrors use, 
so it seems only fair to not be profligate with it.

Best Regards,

Andy



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