[mkgmap-dev] Cutting down the default style

Mon Nov 7 12:01:32 GMT 2011

On 11/07/11 13:47, Marko Mäkelä wrote:
> On Mon, Nov 07, 2011 at 12:34:10PM +0100, Minko wrote:
>> Since Lambertus who compiles the world routable maps filters all
>> boundaries with certain admin_levels out of the data, this could be an
>> explanation that your highway is gone. Solution: remove the tag
>> admin_level=10 from this road.
>
> Alternative solution: instead of filtering the data, why not filter the
> style file (remove the rules that generate the unwanted objects)?
>
> IIRC, Lambertus also filters out power lines from the data. Does anyone
> want to have them in the default style? If not, I think that the default
> style should omit boundaries and power lines. They are rarely useful in
> well-mapped areas.
>
> I understand why Lambertus does not want to have power lines on his
> maps. They can be confusing on wide zoom levels when a power line goes
> through fields and forests, but there is no road next to it (not even a
> decent bicycle path).
>
> Other things that might be useful to remove from the default style are
> various natural=*, building=* and landuse=*, except waters. These could
> be generated in separate, transparent layers, similar to how I generate
> various route relations for Finland at
> http://www.polkupyoraily.net/osm/.
>
> A multi-layer map would allow the user to select what to see on the GPS
> receiver unit. When you go offroad, you would probably enable the power
> lines and maybe boundaries, and foot/bicycle routes and disable other
> routes, except maybe route=bus if you are looking for transportation
> back to the town.

would it be possible to create such default layer styles ? so user could 
use them without designing their own style.

for example, i find power lines very useful outside of large cities, 
which is where i do quite some mapping work. same goes for buildings - 
i'd actually want to see them in some more distinct colour in the 
default style files, currently they are nearly invisible. but seeing 
them allows me to better decide what data to collect.

> If nobody opposes this "diet" of the default style, I would like to do
> it.
>
> 	Marko
-- 
  Rich