[OSM-talk] City routing grid for Australia and the US

[Toby Murray]

On Sun, Jul 22, 2012 at 3:01 AM, Toby Murray <toby.murray at gmail.com> wrote:
> I already shared this on talk-us but since I have some degree of
> worldwide coverage I guess I'll share it here too.
>
> I noticed that the bot sometimes removed the highway=* tag but left
> the oneway=* tag in place. At least here in the US, most such ways are
> a part of the interstate system and since they are missing the highway
> tag, greatly impact routing.
>
> So I queried for ways with a oneway tag but no highway tag and put
> them on a map. I am pre-rendering the tiles using Maperitive so
> worldwide coverage only goes down to z10. I have added up to z13 in
> some areas and will add more for higher density areas. I have already
> done the UK, Spain/Portugal, some of France and the big cities in
> Australia down to z13. You can see the map here:
> http://ni.kwsn.net/~toby/OSM/maps/redaction.html
>
> Or use it as a tile URL in JOSM:
> tms:http://ni.kwsn.net/~toby/OSM/maps/oneway/{zoom}/{x}/{y}.png

I've been using this to guide my remapping efforts today and it is
indeed quite useful, even without high zoom levels. I did add z11 for
most of Europe though. I load it up in JOSM to find an area to edit.
Once I download data, it is usually pretty easy to pick out the way
that is missing its highway tag. It will be at the middle of the big
red blob from the tiles. But don't just fix the highway tag. I find
that where there is one way without a highway tag, there will usually
be other problems too like missing or disconnected _link roads or
missing bridges or the like.

Toby