[mkgmap-dev] Style function is_connected ?

Mon Feb 25 13:55:58 GMT 2013

Hi,

Chris66 wrote
> Hi,
> 
> would a new style function is_connected() be difficult to implement ?
> 
> It should result "no" for example on this way:
> 
> &lt;http://www.openstreetmap.org/browse/way/45838172&gt;
> 
> Because it is not connected to any other highway.
> 
> Benefit: You could make such routing islands non routable.

I think it is not possible now. A way is passed to the style evaluation
system,
and that system says whether it is a road or not.
To answer the question if a road is connected or not you have to know all
roads.
So, we would need a second pass of style evaluation. 
On the other hand, I doubt that it causes problems when such a way is marked
as
a road. A routing algo should not use it to get out of the square.

Gerd

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