[Tagging] Waterway direction

[Peter Wendorff]

  On 01.09.2010 08:32, Nathan Edgars II wrote:
> On Wed, Sep 1, 2010 at 2:16 AM, Pierre-Alain Dorange<pdorange at mac.com>  wrote:
>> so "flow_direction" ?
> How would you know if local waterways have the wrong direction without
> specifically checking for the problem? OSM relies on the "enough
> eyeballs" principle for finding major errors.
of course, but Mapnik is not the application to show everything which 
could be a modelling error.
Mapnik is a renderer for a map.

To find errors, use the database or specialized tools like the ones from 
Geofabrik.
If there is no tool for checking waterway directions, perhaps someone 
has to build one!?

If you can see errors at mapnik, that's good - but don't change Mapnik 
to visualize more errors.

Peter