[OSM-newbies] How can I know what each level of detail/zoom level contains?

[Afriza N. Arief]

On Fri, Jun 11, 2010 at 4:24 AM, David ``Smith'' <vidthekid at gmail.com>wrote:

> On Thu, Jun 10, 2010 at 2:28 AM, Afriza N. Arief <afriza.na at gmail.com>
> wrote:
> > Hi
> >
> > I want to render OSM data. How can I know which nodes / ways should I
> draw
> > for each zoom-scale/level-of-detail?
> > I am getting the data from http://downloads.cloudmade.com/asia/singapore
>  and
> > from "export" feature at http://www.openstreetmap.org/
> > Regards,
> > Afriza
>
> That's a matter of personal choice.  It's your map, so it's up to you
> to decide what features to display at what zoom levels (if at all).
> These choices are made in the process of creating a style sheet, which
> tells the renderer how to transform the OSM data into a visual map.
> Exactly how this is accomplished depends on the renderer you intend to
> use.
>

Maybe I should mention that I want to convert the .OSM data into binary form
(SQLite database), and then render it in mobile devices without the need of
internet connection.
One of the issues is to determine which "feature" I need to draw at certain
zoom level such that I will still be able to draw pretty fast (minimum
amount of nodes).

To get started, I was hoping there is an existing table or guideline on
which should be drawn. Based on the result maybe some adjustments need to be
applied, but first, it will be helpful to have existing info on that.

For reference purposes: if you decide to use a tile system based on
> the Spherical Mercator projection, like OSM's web map does, here's a
> list of the physical size of one square tile's coverage for each zoom
> level at Singapore's latitude:
> 0: ~40,000 km (whole planet except polar regions)
> 1: ~20,000 km
> ...


Any info on what features are rendered at each zoom level?

Does this font make me look fat?


No : )

I mean, I don't have the slightest idea on how you'd look from the font you
are using : P
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