[OSM-talk] Parking aisle as boundary of car park not showing

[nicholas.g.lawrence at mainroads.qld.gov.au]

> My main problem with mapping areas to the centre line (I'm not really
> counting landuse here, its possibly an exception) is the farcical
> situations to which it leads. The buildings example is the best: it's
> not uncommon at all to have a road abutted on both sides by buildings.
> If we map them to the centreline then we possibly increase their size
> by 50%, and happily record that they share a wall. Obviously they
> don't, and if you somehow figure out there's also a road in there, you
> might be able to reconstruct the real situation given a road width
> (which very few people actually record).

One option may be to differentiate between;
- a road, represented by a line and
- a corridor, represented by an area.

The corridor would be that area of land over which the relevant
road authority has responsibility and control. Ie the road
authority is in charge of not only the bitumen, but also
the grass verge, drains, signs, flower stalls, etc...

The road would exist inside the corridor, in fact multiple
roads can exist inside a single corridor (think of complex
intersections). Or a corridor could have no roads at all
(think of a road that is planned, but not yet constructed).

The road line would still be used for routing, but the
road corridor would be used to define that area which
is exclusively road, and which neighbouring features
butt up against.

But now we are talking about a cadastre map, not a street map.

nick


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