[Tagging] Landuse border alignment

[M∡rtin Koppenhoefer]

2010/5/17 Pieren <pieren3 at gmail.com>:
> On Mon, May 17, 2010 at 2:00 PM, Jonas Minnberg <sasq64 at gmail.com> wrote:
>>
>> I'm kind of considering if this is right or not - if a road is the divider
>> between two landuses, is it still best to unglue it from the landuse(s) and
>> move it into one or the other?
>>
>
> It's best to unglue but it's also not wrong to glue the landuse. Some will
> say it's inaccurate, but hey, drawing a road with a polyline is also
> inaccurate.


can't follow you here: if some errors are inherent (missing
curve-functions) we should put some other additional errors because it
doesn't matter any more?


> In some cases, ungluing can be worst : imagine two parallel streets and one
> pedestrian square in between. If you unglue the square, you need polylines
> to represent the roads connection (for e.g. pedestrian routing).


pedestrian squares are an exception (they are routable polygons).


 These lines
> are inacurate because they can be drawn at some intervals only where
> physically the connection is everywhere along the square.


use an area-relation to model this is you want.

The only situation where landuse and streets might be sharing the same
nodes is when the street is mapped as an area (not tagged as highway
but probably additionally to the abstract centre-lines (highway) we
are needing for routing).

cheers,
Martin