<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Pieter,</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">> At last, how comes you don't reuse the <span style="font-family:monospace">admin_level=9</span> if they are the same?</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">Yes I reuse them!</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"></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Initially, as I was busy with an inventory of ancient maps at the State Archives in Arlon, I was looking for ancient municipalities boundaries as vectors. Moreover user 'jfonda' asked for postal_code boundaries. I observed that <span style="font-family:monospace">admin_level=9<span style="font-family:arial,sans-serif"> could be used for both. <br></span></span></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:monospace"><span style="font-family:arial,sans-serif"><br></span></span></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:monospace"><span style="font-family:arial,sans-serif">From t</span></span>he <span style="font-family:monospace">admin_level=9<font face="arial,sans-serif"> boundaries I prepared relations for (a) the municipality cadastral 'divisions' and (b) the postal codes.</font></span></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:monospace"><font face="arial,sans-serif"><br></font></span></div><span style="font-family:monospace"><span style="font-family:arial,sans-serif"></span></span></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:monospace"><span style="font-family:arial,sans-serif">But there are a few exceptions:<br></span></span></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><ol><li><span style="font-family:monospace"><span style="font-family:arial,sans-serif">some postal boundaries do not follow the administrative boundaries</span></span></li><li><span style="font-family:monospace"><span style="font-family:arial,sans-serif">some cadastral 'divisions' do not follow the ancient (= pre 1977) municipality boundaries</span></span></li></ol><div>Did I reply to your question?</div><div><br></div><div>Pierre<br></div></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:monospace"><span style="font-family:arial,sans-serif"></span></span></div><br><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><span style="font-family:monospace"><font face="arial,sans-serif"><br></font></span></div></div>