[Talk-GB] Southwark update

[SK53 on OSM]

On 03/03/2011 09:51, Richard Mann wrote:
> I think you might also consider a path density map or a
> shop/pub:street density map. That's the sort of stuff where OSM can
> really do much better than OS / Google.
>
> Richard
>
>
This was exactly what I was trying to do with my various pub density 
maps <http://sk53-osm.blogspot.com/2011/02/updating-pub-density.html>. I 
did do various attempts to normalise pub density to highway length but 
none of them showed anything interesting. I have also looked at turn 
restrictions, and public toilets as potential proxies for things mapped 
on the ground versus things mapped remotely. A recent diary entry 
pointing to Gregory Williams cycle-parking heatmap highlighted another 
possible candidate. Unfortunately most of these maps (like the Botanical 
Society's maps 
<http://www.bsbimaps.org.uk/atlas/map_page.php?spid=2952.0&sppname=Cotoneaster%20rehderi&commname=Bullate%20Cotoneaster>of 
distribution of /Cotoneaster /species) mainly show where mappers live or 
are active.

As more of the highway network gets completed by remote mapping, the 
more important it is to find handles for on the ground mapping.

Pete Reed did some nice comparisons 
<http://tlatet.blogspot.com/2010/04/more-osm-coverage.html> between 
highway length by authority as reported by the DoT and OSM road length. 
I'm not aware of him having updated these recently.

Incidentally, 0% discrepancy between OSM and OS Locator is inadequate as 
an indication of streetname completion: the next test would be to check 
OSM names against PAF to see how many address elements were missing. 
Unfortunately, we would not be able to use any of the detail: but even 
headline figures by LA might be interesting. I've noticed a trend in new 
in-fill huosing developments for houses facing a main road to have a 
separate name (e.g., here <http://osm.org/go/eu8Z4HWl1-->), which does 
not appear in Locator, nor do side terraces in late-19C/early-20C 
housing (e.g., here <http://osm.org/go/eu8ZmJWOR--> or here 
<http://osm.org/go/eu8Zn0fu1-->). All these examples are places I've 
added this year.

Jerry

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