[OSM-talk-be] Blackspots

[Ben Abelshausen]

It's nog exactly as you are describing it. I have a dataset of addresses
(geocoded with lat/lon) covering almost all of Flanders. Then we use our
software to find the closest street with the same name. If no street with
the same name can be found the closest street is taken.

This all returns a distance and then we filter all these that have distances
higher than let's say 50m. This gives us a good estimate of where roads are
missing!

I can share lat/lon/distance records that we use to generate the 'heat'maps.
I think there are about 50000 with a distance > 50m. The records will have
no address data (postalcode, street, housenumber), that is the part i am not
supposed to share.

I hope you can understand my chaotic explanation! :-)


On Fri, Oct 14, 2011 at 5:28 PM, Jan-willem De Bleser
<jw at thescrapyard.org>wrote:

> On Fri, Oct 14, 2011 at 16:10, Ben Abelshausen
> <ben.abelshausen at gmail.com> wrote:
> > Hello,
> >
> > I have this data I would like to share with the Belgian mappers:
> > http://www.14k.be/node/179 !
> >
>
> Hi Ben,
>
> Fascinating idea. If I understand correctly, you have a (confidential)
> list of addresses and are checking if they can be found in OSM? I
> assume you already have GPS coordinates for these addresses and place
> a black spot there if the street is not found?
>
> You can't share the addresses, but you can share rendered heatmaps?
> How large is the collection of images? Is it at one fixed zoom level?
>
> I think they would be useful for active mappers, who can then check if
> there are any areas in their territory they may have missed. Few
> people will want the whole data set, so we should find some way of
> making it available by region. I know I'd be interested to see if
> there are any black spots near my home.
>
> Cheers,
> Jw
>
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