[OSM-talk] Advanced highway tagging

[Dave Stubbs]

On 19/11/2007, Karl Newman <siliconfiend at gmail.com> wrote:
> On Nov 19, 2007 3:04 PM, Andrew MacKinnon <andrewpmk at gmail.com> wrote:
> > A third property, zoom level, is used to determine at what zoom level
> > roads are shown - so as to show minor roads connecting isolated towns
> > in remote areas at low zoom for example, but not show hundreds of
> > arterial roads around Central London at low zoom and clutter up the
> > map.
>
> Your suggestions seem okay in general, but I'm strongly opposed to
> including the "zoom level" in the map data. That is a presentation
> detail for specific renderers that should be derived from the other
> tags. Especially with your other suggestions, it seems like that's
> enough data to determine a zoom level.
>

Absolutely right.

Decluttering areas is something for the renderer to sort out, not
something to try and embed case by case in the database. With all that
data the renderer should be able to decide what roads to prioritise if
it wants to do this. Also some maps are going to want to prioritise
different properties, so hard coding zoom for some particular
rendering is a bad idea.