[OSM-dev] coastline error checker and crossing ways

[Cartinus]

On Thursday 13 August 2009 00:37:57 Ben Supnik wrote:
> Hi Y'all,
>
> The coastline error checker is alive again!  Awesome! :-)
>
> Can anyone tell me what the black line means, e.g. why do some
> continents have it and not others?

The black line means that somewhere on that continent the coastline is broken.

Black lines are polylines. Whole continents are polygons. They are in a 
different output file of the coastcheck utility.

> Also two quality q's:
>
> 1. Pyramid Rock off of the coast of SF flags an error...I'm not sure
> what's going on here.
>
> Way 32289185 is a CCW square island -
>
> http://www.openstreetmap.org/browse/way/32289185
>
> It looks okay to me but renders as a triangle, not a square, on the map.
> (Is it possible the base tiles haven't been updated in a while?)
>
> Way 32289186 is a closed CCW triangle, that doesn't show on the map at all.
>
> Does anyone know why the coastline error checker dots this or the map
> tiles are wrong?

It's probably too small. In a previous discussion about too small islands 
Martijn posed the question if we should really call that coastline and not 
use another tag like natural=rocks or man_made=*

> If the coastline processor source code is available, I could at least
> take a look at it...depending on what toolset it's written on top of, I
> don't know if I am qualified to fix these problems.

http://svn.openstreetmap.org/applications/utils/coastcheck/



-- 
m.v.g.,
Cartinus