[Talk-GB] Landuse in greater london

[Gregory]

A few weeks ago I thought I should write something about my views on
landuse.
They flicker between liking landuse and disliking. Also should they share
nodes with roads or be independent of anything else.

Overall I like them now an see reason for them, even in a finished map
database. What if I want to make a map that doesn't care about navigation
(or at least local navigation), a lot of maps just draw grey blobs where
there are built up areas (aka the landuse in OSM). I would like to create a
map of just landuse (okay maybe with water and parks to get your bearings)
to show what it looks like.

I am fixing up the landuse you did in my suburb, but my editing has to pass
across to add housenumbers anyway!

I will try and write up all my thoughts soon.


On 25 May 2010 11:32, TimSC <mapping at sheerman-chase.org.uk> wrote:

> Hello people,
>
> I have finished a personal project of mapping landuse in Greater London
> from yahoo imagery. The inner section (roughly underground zone 1)
> cannot be usefully mapped from yahoo since all the buildings look the
> same - houses don't have gardens that are discernible. Outside zone 1 to
> the M25, the map benefits from land use data. The effort has been on and
> off work since mid 2007 until yesterday! It took a while... I am
> surprised that people don't comment on how odd the map looks without
> landuse being assigned and work to rectify it. I also found many missing
> roads and other interesting features. I started in Dartford and worked
> roughly clockwise to get to Romford. I know people like to have highly
> accurate OSM mapping, but users also expect good coverage. That allows
> users to say "where the map is blank, there is nothing there". This is
> not very compatible with a typical mapper thinking "where a map is blank
> is where I should go mapping". The latter view is not sustainable as we
> move towards good coverage. We need other tools to track progress rather
> than coverage. Using source tags appropriately helps a great deal.
>
> Of course I did not do it all, so thanks for those who did land use in
> this area. I hope people can use it as a basis for refinement based on
> local knowledge and survey.
>
> The next step is to collect landuse data for the central area. I suspect
> if people used their local knowledge, a significant amount could be done
> with little effort. An alternative is to estimate it based on the
> features and road layouts, but this is would not be very accurate. Or
> does anyone have a better idea? Possibly a series of land use mapping
> parties for central London?
>
> Regards,
>
> TimSC
>
> PS I have not done anything on tracing buildings recently, but I
> probably will soon.
>
>
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-- 
Gregory
osm at livingwithdragons.com
http://www.livingwithdragons.com
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