[Mapcss] Bug in the mapcss introduction slieds of Maskim?

[Thomas Davie]

At least in my interpretation of MapCSS, the behaviour when two objects are defined to have the same z-index is undefined.  The order of rendering here should (in my book) be effectively random.

Bob
if (*ra4 != 0xffc78948) { return false; }

On 27 Jan 2012, at 12:24, Peter Wendorff wrote:

> Hi.
> I have to give a short introduction to someone who should implement a mapcss renderer and looked into the docs availlable for that.
> For that I especially looked into the sotm-eu presentation done by Maskim [1], and I fear there is a small bug on slide 7 (and the following pages).
> 
> The stylesheet presented does not contain any z-index or layer definitions. To quote the slide, it's defined as:
> 
> line[highway] {
>    color: orange;
>    width: 11;
> }
> 
> area[building] {
>    fill-color: gray;
> }
> 
> line[waterway] {
>    color: blue;
>    width:3;
> }
> 
> The image presented nearby shows a similar image, but the highway is rendered on top of the river.
> Shouldn't that be the other way around (according to the mapcss code, not to "good maps")?
> 
> regards
> Peter
> 
> [1] http://sotm-eu.org/slides/10_MaksimGurtovenko_MapCSS.pdf
> 
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