I have taken Bernard's original visual comparison (location data) and Alex's
scoring (numerical comparison) and produced a map to visualise the results of
the comparison.
The result can be seen at:
http://maker.geocommons.com/maps/1784
I have tried to remove any capitals that were mis-placed or incorrect, and
obviously am using Alex's somewhat subjective metric.
The size of the circles are proportional to the values for both, so small is
poor coverage and large good. The overlap of the circles shows who appears to
be doing better (orangey/brown showing means that osm is doing better, blue
google).
The geo-located data table is available from the link on the site.
Thanks to the Geocommons Maker! service this was quite easy to achieve,
although I would have like to be able to show results on a combined scale from
+5 (for osm 5, google 0) to -5 (osm 0, google +5), with 0 for equal, but
couldn't find a way of using a bi-polar colour scale for point data in the
software (having calculated a new column in the spreadsheet).
Cheers
STEVE
-----Original Message-----
From: [EMAIL PROTECTED] on behalf of Edward Johnson
Sent: Fri 12/5/2008 7:53 PM
To: [email protected]
Cc: Alex Mauer
Subject: Re: [OSM-talk] Google Maps - OSM comparison
At CloudMade we have been doing a lot of research and comparison into
the quality and completeness of the map but more focussing on Europe and
the USA. So it is very interesting to see this and see just how far
ahead we seem to be in less developed areas.
I would be very interested in looking through that spreadsheet Alex,
could you send it over to me. Perhaps I will go through the list myself
and do some rankings and we can compare results.
Ed Johnson
[EMAIL PROTECTED] wrote:
>
> Captials in Europe are done very well (Vaduz is an exception)
> >
> > In South America OSM is far behind Google
> >
> > In Afrika the winner is OSM
> >
> > In Asia it's mixed.
> >
>
>
> I ran through the whole list, ranking the quality of the map for each
of
> OSM and Google on a scale of 0-5. (0 meaning that the map is blank or
> only the name appears, 5 meaning that it doesn't seem like anything is
> missing from the map) Assuming I did a good job of ranking, OSM is
> slightly ahead of Google worldwide and in in Africa and Asia. In
> Europe, OSM is well ahead. Google is slightly ahead in Oceania, and
> well ahead in North and especially South America
>
> Here are the results (I can provide my rankings in a spreadsheet as
well
> if anyone is interested):
> OSM Google
> World 2.64 2.50
> Africa 2.02 1.78
> Asia 2.62 2.36
> Europe 3.90 3.38
> N Am 2.17 2.77
> Oceania 2.19 2.35
> S Am 2.36 3.21
>
> -Alex Mauer "hawke
>
>
>
>
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