[Talk-transit] generate a public transport map for a city

[Alexandr Zeinalov]

> Hi,
>
> Thanks for the wiki.
>
> If i import another batch of osm file in the existing sql, is problematic?
> or the script will clear on his own?

You may import another OSM file with different prefix (osm2pgsql -p
newprefix) and leave existing data untouched.