[OSM-talk] displayed width of roads

[Andy Allan]

On Feb 18, 2008 2:50 PM, Dermot McNally <dermotm at gmail.com> wrote:
> On 18/02/2008, Jeremy Adams <milenko at king-nerd.com> wrote:
> > My "fix" for the situation you linked to was to set motorway_links to layer=-1.  This puts them underneath the main roads and makes the map look much nicer IMO.
>
> By co-incidence, I was in contact with another mapper who's been doing
> something like this to make low zoom osmarender rendering a bit
> prettier. What's everybody's opinion of this kind of practice?

Gaaaaaaarrggggggggggghhhhhhhhh!

:-)

If someone wants to monkey around with the rendering, they should use
renderer-specific tags, such as mapnik-motorway=up_a_bit. We used to
do something similar when osmarender was having big problems with
getting the text the right way round and mapnik was coping fine - we
had an osmarender-specific tag. But for most things it turns out that
fixing the rendering problem is easier than getting it to recognise
new tags, and so everything works out fine and things are done
properly.

Deliberately tagging things incorrectly is bad practice. There are so
many renderers out there that if what you do works for more than one
of them that's just coincidence. And when bad practices like this
become entrenched it becomes a complete mess when the renderer
eventually gets improved, as they always do.

Cheers,
Andy

> Is it
> not an example of compromising the data (which we want to endure) to
> work around a temporary deficiency in one particular renderer?
>
> Dermot
>
>
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