[OSM-newbies] one country and updates

[Craig Wallace]

On 31/05/2012 15:16, weedget wrote:
> Hi,
>
> I downloaded file for my country and uploaded it to database with success.
> It was 2 months ago.
>
> How easy can I now update my data?
> Should I get again whole file or I can do this with these diff which are
> published by OSM (files for Poland I got from geofabrik.de)?
> Any link to how to or something?

If you only want to update every month or so, then yes it is probably 
easiest just to download a new complete extract. Then import it into 
your database, the same as you did originally.

> As I remember if tiles generation script (from mapnik) is omitting already
> existing tiles, so is there any method to regenerate these which are
> different?

This depends on what sort of tile generation script you are using.
If its just the generate_tiles.py, I don't think there is anyway of just 
rendering changed tiles. And it will skip any tiles that already exist 
in the output directory.

You could change the output directory, then it will render all of the 
tiles again.
Though this may take a while, if it needs to render tiles for a whole 
country, at a high zoom level.