<div dir="ltr">thank you. I'm gonna try. It looks I have just to select my layer and then paste the code into python editor.<div>isn't it?</div><div><br></div><div>If so, do you have an idea how to choose also the second longest?</div><div><br></div><div>this is what I have in the code:</div><div><br></div><div><pre class="gmail-lang-html gmail-s-code-block" style="font-size:13px;margin-top:0px;padding:12px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;line-height:1.30769;vertical-align:baseline;box-sizing:inherit;width:auto;max-height:600px;overflow:auto;border-radius:5px"><code class="gmail-hljs gmail-language-xml" style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;font-stretch:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;box-sizing:inherit;background-color:transparent;white-space:inherit">longest_line = max(all_lines, key=lambda x: x.length())</code></pre><pre class="gmail-lang-html gmail-s-code-block" style="font-size:13px;margin-top:0px;padding:12px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;line-height:1.30769;vertical-align:baseline;box-sizing:inherit;width:auto;max-height:600px;overflow:auto;border-radius:5px"><code class="gmail-hljs gmail-language-xml" style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;font-stretch:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;box-sizing:inherit;background-color:transparent;white-space:inherit"><br></code></pre><pre class="gmail-lang-html gmail-s-code-block" style="font-size:13px;margin-top:0px;padding:12px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;line-height:1.30769;vertical-align:baseline;box-sizing:inherit;width:auto;max-height:600px;overflow:auto;border-radius:5px"><code class="gmail-hljs gmail-language-xml" style="margin:0px;padding:0px;border:0px;font-style:inherit;font-variant:inherit;font-weight:inherit;font-stretch:inherit;line-height:inherit;font-family:inherit;vertical-align:baseline;box-sizing:inherit;background-color:transparent;white-space:inherit">thanks again</code></pre></div><div><pre class="gmail-lang-html gmail-s-code-block" style="margin-top:0px;padding:12px;border:0px;font-variant-numeric:inherit;font-variant-east-asian:inherit;font-stretch:inherit;line-height:1.30769;font-size:13px;vertical-align:baseline;box-sizing:inherit;width:auto;max-height:600px;overflow:auto;border-radius:5px"><br></pre></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno mar 8 feb 2022 alle ore 00:54 Sebastian Gutwein <<a href="mailto:bas@rdgland.com">bas@rdgland.com</a>> ha scritto:<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="auto">This stack exchange answer seems like it would work for you. <div><a href="https://gis.stackexchange.com/a/365955" target="_blank">https://gis.stackexchange.com/a/365955</a></div></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Feb 4, 2022 at 11:33 AM chris hermansen <<a href="mailto:clhermansen@gmail.com" target="_blank">clhermansen@gmail.com</a>> wrote:<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="auto">Might generalizing the lines (Poiker Douglas or similar) yield four line rectangles?</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Feb 3, 2022, 23:44 Etienne Trimaille <<a href="mailto:etienne.trimaille@gmail.com" target="_blank">etienne.trimaille@gmail.com</a>> wrote:<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>Maybe "oriented_bbox" to get first a proper rectangle ?<br></div><div><a href="https://docs.qgis.org/testing/en/docs/user_manual/expressions/functions_list.html#oriented-bbox" rel="noreferrer" target="_blank">https://docs.qgis.org/testing/en/docs/user_manual/expressions/functions_list.html#oriented-bbox</a></div><div><br></div><div>But then, you might have some tiny leftover. It depends if you care or not.</div><div><br></div><div>Otherwise, you need to use the angle at each points.</div><div><br></div><div>I thought there is the longest line possible within a polygon, but I can't find it. I did it manually a few years ago.<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Le jeu. 3 févr. 2022 à 23:29, Dario C <<a href="mailto:dario955i@gmail.com" rel="noreferrer" target="_blank">dario955i@gmail.com</a>> a écrit :<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">Hi,<br><div>I have several rectangles (almost squared) and I'd like to represent their diagonals.<br><br>I started to do with geometry generator with:</div><div>make_line(point_n($geometry,1),point_n($geometry,4))<br></div><div>and</div><div>make_line(point_n($geometry,2),point_n($geometry,5))<br></div><div><br></div><div>Unfortunately, even if they look rectangular, actually they have more then 4 points and, moreover, points do not always have the same order.</div><div><br></div><div><div>here below an example:</div><div><img src="cid:ii_kz7jsrjs0" alt="image.png" style="width: 667px; max-width: 100%;"></div></div><div><br></div><div>Is there any expression in order to pick the two longest segments connecting all the points of the geometry?</div><div><br></div><div><br></div><div>Thanks</div></div>
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</blockquote></div></div>-- <br><div dir="ltr">Sent from a phone. Amazing! But possibly garbled.
Sebastian Gutwein
Regenerative Design Group
1 Chevalier Ave Greenfield MA
<a href="mailto:Bas@rdgland.com" target="_blank">Bas@rdgland.com</a>
(631) 241-1018</div>
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