[OSM-dev] Can tag values be longer than 255 chars?

Toby Murray toby.murray at gmail.com
Thu Apr 5 04:45:32 BST 2012


On Wed, Apr 4, 2012 at 10:10 AM, Morten Olsen Lysgaard
<morten at lysgaard.no> wrote:
> I'm running an instance of the OSM stack. I'd like to have some key values
> longer than 255 chars. Is this a hardcoded limit. Can it be lifted? Does it
> need a migration?
>
> As always, thanks for the help! =)

It is part of the database schema:
https://github.com/openstreetmap/openstreetmap-website/blob/master/db/structure.sql

Look specifically at the create statement for node_tags, way_tags and
relation_tags tables.

I imagine it might also be encoded in rails somewhere too in order to
check uploads and send error messages back to the client. Not sure
about that though.

Toby



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