[Talk-GB] building shapes from OS Street View

[Tom Chance]

On 24 May 2010 13:02, Ed Avis <eda at waniasset.com> wrote:

>
> Fundamentally, though, our goal is surely to get the best possible free
> map.
> Even in a town where no OSM contributor lives, the OS data makes a valuable
> contribution.  The building shapes are simplified, to be sure, but
> generally
> superior in quality to those that have been traced from the fairly low-res
> Yahoo
> imagery.  So by all means take care of your local area first, but we
> shouldn't
> lose sight of the broad goal of nationwide coverage.  If we need to get
> more OSM
> contributors in unmapped parts of the country, one of the best ways to do
> that is
> to give them the best head start possible by 'armchair mapping'.
>

I have to agree - let's automatically trace buildings for the whole country
with a verification tag attached to every building, and add a rule to the
nonames layer or create a similar layer.

Here in London there are huge swathes that will simply never get done by any
other method because we haven't got enough active mappers. Getting buildings
right is extremely time-intensive work compared to basic roads and green
spaces, which is where much of London remains after the tracing and mapping
parties.

Building shapes are quite different to importing post offices, road layouts
and other specific things that definitely need verification on the ground
before being added to the database.

Regards,
Tom

-- 
http://tom.acrewoods.net   http://twitter.com/tom_chance
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