[OSM-dev] indoor wifi geopositionning - openstreetmap precision, collaborators?

[Jonathan-David SCHRODER]

Ok thank you very much. I didn't know that openstreetmap site, API and core
db interface were in ruby.
Thank you for that piece that proves for a sufficient database storage
precision for our indoor mapping project !!!

This is cool and both Lars and you answered quickly thanks.

Jonathan

On Mon, Nov 30, 2009 at 4:34 AM, Lars Francke <lars.francke at gmail.com>wrote:

> > The only thing I see potentially getting in your way is that the OSM
> > database doesn't store enough significant digits of lat/lon
> > coordinates to make indoor mapping viable, but perhaps it does. I
> > couldn't find documentation on how many digits it stores and how that
> > translates approximately into real-world meters/centimeters. Perhaps
> > someone else can chime in with that information?
>
> The code is here:
> http://svn.openstreetmap.org/sites/rails_port/lib/geo_record.rb
> Seven fractional digits are saved. That should be somewhere in the 1-3
> centimeter range depending on where you are and I believe that'll be
> enough for indoor mapping :)
>
> Lars
>
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>
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