[OSM-talk] All you've ever wanted to know about the french cadastre

Martin Koppenhoefer dieterdreist at gmail.com
Thu Sep 27 11:57:36 BST 2012


2012/9/27 Pieren <pieren3 at gmail.com>:
> On Thu, Sep 27, 2012 at 12:01 PM, Martin Koppenhoefer
> <dieterdreist at gmail.com> wrote:
>> buildings should follow reality (which they apparently don't do at all
>> in the cadastre version).
>
> How can you say that from an aerial imagery ? It is also possible that
> the cadastre is outdated. Like any source of contribution, including
> local survey.


You are right that I cannot be 100% sure from aerial imagery, but how
probable would you think it is that they tore down the whole building
complex and reconstructed it split into different volumes but inside
the same total volume and shape? Would they have also reconstructed
the sheds and anxilliary building parts (if the cadastre is outdated)?
How probable are building divisions like in the cadastre version,
where there are very narrow buildings without direct access to the
street in building which is not particularly wide? From an architects
point of view the building partitions don't look real, it would be
really strange if they were like this, but you are right that I can't
exclude they are really like this, hence the "apparently".

cheers,
Martin



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