[Talk-us] mapping job - unconnected _link roads

[Martijn van Exel]

The example I gave isn't great - these _link roads are actually
connected, they just dangle. But there are lots that are actually not
connected. It looks OK on the map usually, and it's easy to miss when
you're editing, but this type of error messes up routing.

Martijn

On Tue, May 29, 2012 at 9:24 PM, Martijn van Exel <m at rtijn.org> wrote:
> Hi,
>
> I've been looking at unconnected _link roads (see here [1] for a
> typical example) for the US, and found 1200 likely candidates. A
> shapefile as well as an .osm file you can load in JOSM can be
> downloaded here: http://lima.schaaltreinen.nl/osm/
> The script I ran (on osmosis snapshot + linestring schema) is here:
> https://github.com/mvexel/osm-gradesep/blob/unconnectedlinknodes/sql/09-missinglinknodes.sql
> There are some false positives in there, but it looks like more than
> 90% of these nodes warrant inspection.
> I ran this analysis on the last planet from before 1/4, so some of
> this may already have been fixed.
>
> [1] https://www.dropbox.com/s/85dqb7fm7whevxw/unconnectedlink.png
> --
> martijn van exel
> http://oegeo.wordpress.com



-- 
martijn van exel
http://oegeo.wordpress.com