[OSM-talk-be] Belgian cadastre

[Jo]

2013/2/4 A.Pirard.Papou <A.Pirard.Papou at gmail.com>

>  Hi,
>
> So, the French people use data from their cadastre to build OSM.
> I have received from a notary an official map from the Belgian cadastre.
> Scan of a photocopy of a photocopy of... that's the technology.
> It is wrong.
> At first sight, there's an angle in one of the field sides that is
> straight on land and on a geometer's map.  Further more, I tried every
> trapezoidal warp I could and I was unable to make a fit overlay to the PICC
> map (every time I adjusted one side, the other one went wrong).
> Anyone with a cadastre experience?
> Why don't they send people geodesic coordinates or a GPX trace of the
> fields?
>

It's not exactly clear what message you're trying to bring here. Anyway, if
you want an extract of your own house from cadastre, you can simply go and
ask at the city hall. Somebody also showed me this website on FOSDEM:

 http://ogc.beta.agiv.be/gdiviewer/?simple=false

It only works for Flanders, but it's pretty nifty.

Of course, it's probably not wise to copy from it to add data to OSM
(unfortunately). I already found some errors on it, where a new street was
created recently.

I have no idea how they would react if we were to ask permission to use it
as a background layer to draw from...

Anyway, maybe it solves the problem you have with the warped copy of a copy
of an extract of the cadastre.

Jo
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