sent from a phone
> On 21. Sep 2018, at 21:32, André Pirard <[email protected]> wrote: > > The whole cadastral map is offset by that 7m. > ... > > Picture 3: So, I dragged his parcel right onto the wall. > And now it's correctly located, aligned with the fencing all around. how did you know which source was off, the cadastral map or the orthophoto? > ... > > The Belgian cadastre is not the only one with an error shift. > With JOSM, I have similarly proved that Google Map has a 120m NE shift in > Beijing. > Nobody noticed it. it is well known that the chinese government requires all imagery and map providers to use chinese algorithms which distort the map coordinates systematically, in a way that they remain usable as long as your navigation system uses the same algorithms. Ciao, Martin
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