<div dir="auto"><div dir="auto">Hi Pierre, </div><div dir="auto"><br></div><div dir="auto">I mapped a lot of boundaries in West-Flanders, using a tips from Marc Deridder (user mdri on OSM) who sadly passed away just months after finishing the Flemish borders.</div><div dir="auto"><br></div><div dir="auto">Marc mapped most of the Flemish borders by using out-of-copyright Ferraris maps. These could be aligned to the road network in OSM (remember, this was before the availability of aerial imagery). This is also why the part-municipalities were mapped before the municipalities: the Ferraris maps show the old borders. </div><div dir="auto"><br></div><div dir="auto">The borders have actually changed very little in that time. By carefully defining reference points, and combining maps for both sides of the border, we could usually get an accuracy of a few meters (good enough for geocoding, which was the first aim).</div><div dir="auto"><br></div><div dir="auto">Some borders did change in that time. I remember having issues with the border between Rumbeke and Izegem. But most changes just aligned borders to distinct features. In the case of Rumbeke and Izegem, the border was aligned to the E403 motorway.</div><div dir="auto"><br></div><div dir="auto">I hopo this clears up some of the mysteries.</div><div dir="auto"><br></div><div dir="auto">Regards,</div><div dir="auto">Sander</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Op za 4 jul. 2020 17:33 schreef joost schouppe <<a href="mailto:joost.schouppe@gmail.com" target="_blank" rel="noreferrer">joost.schouppe@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi Pierre,</div><div><br></div><div>When I had some questions about this, I looked deep into the history of the boundaries, and got a rather detailed answer from QuercE. But this was mostly about part-municipalities in Flanders, so I don't know if it's of much use to you.<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Op vr 3 jul. 2020 om 15:33 schreef Pierre Parmentier <<a href="mailto:pierrecparmentier@gmail.com" rel="noreferrer noreferrer" target="_blank">pierrecparmentier@gmail.com</a>>:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Hello,</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Is anyone still in a position to give the references of the sources available at the time of the introduction into OSM of the communal boundaries in Belgium?</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Pierre P.<br></div></div>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr">Joost Schouppe</div><div dir="ltr"><a href="http://www.openstreetmap.org/user/joost%20schouppe/" rel="noreferrer noreferrer" target="_blank">OpenStreetMap</a> | <a href="https://twitter.com/joostjakob" rel="noreferrer noreferrer" target="_blank">Twitter</a> | <a href="https://www.linkedin.com/pub/joost-schouppe/48/939/603" rel="noreferrer noreferrer" target="_blank">LinkedIn</a> | <a href="http://www.meetup.com/OpenStreetMap-Belgium/members/97979802/" rel="noreferrer noreferrer" target="_blank">Meetup</a></div></div></div></div></div></div></div></div>
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