<div dir="auto">Here's how I do it.<div dir="auto"><br></div><div dir="auto"><a href="https://twitter.com/AlexNetoGeo/status/856395509367525376?s=19">https://twitter.com/AlexNetoGeo/status/856395509367525376?s=19</a><br></div><div dir="auto"><br></div><div dir="auto">Alexandre Neto</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">A quinta, 6/05/2021, 09:21, Andreas Neumann <<a href="mailto:a.neumann@carto.net">a.neumann@carto.net</a>> escreveu:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<p><span style="color:#000000">Hi Gabriel,</span></p>
<p><span style="color:#000000">Yes - this is possible - but it is a bit hard to find.</span></p>
<p><span style="color:#000000">I will try to explain (and yes, this would need improvements in the digitizing chapter of the QGIS manual).</span></p>
<p><span style="color:#000000"><span style="font-family:Roboto,Noto,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">Steps:</span><span style="font-family:Roboto,Noto,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none"> </span></span></p>
<p><span style="color:#000000;font-family:Roboto,Noto,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">1. Enable Snapping on your active layer</span></p>
<p><span style="color:#000000;font-family:Roboto,Noto,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">2. Enable "Self Snapping"</span></p>
<p><span style="color:#000000;font-family:Roboto,Noto,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">3. Press the "Add Polygon Feature" button (but don't yet digitize)</span></p>
<p><span style="color:#000000;font-family:Roboto,Noto,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">4. Enable "Advanced Digitizing"</span></p>
<p><span style="color:#000000;font-family:Roboto,Noto,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">5. In the "Advanced Digitizing" panel select the angles you want to snap to</span></p>
<p><span style="color:#000000;font-family:Roboto,Noto,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">6. Start digitizing by pressing the left mouse button and adding the first segment with the second click</span></p>
<p><span style="color:#000000;font-family:Roboto,Noto,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">7. Add any additional segments by staying with the new segments within the angle tolerance in order to get new segments with proper right angles</span></p>
<p><span style="color:#000000;font-family:Roboto,Noto,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">8. If you want to close: first press "Alt-A" to fix the angle. Second: go to your initial start point and snap to it with the Left Mouse Button</span></p>
<p><span style="color:#000000;font-family:Roboto,Noto,sans-serif;font-size:15px;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:pre-wrap;word-spacing:0px;background-color:#ffffff;display:inline!important;float:none">9. Press "Right Mouse button" to finish editing the polygon</span></p>
<p><span style="color:#000000">Here is a Video demonstrating the steps: <a style="color:#000000" href="https://www.youtube.com/watch?v=JimwOpN8dOU" target="_blank" rel="noreferrer">https://www.youtube.com/watch?v=JimwOpN8dOU</a> (sorry about my voice, I don't have a radio voice ;-) )</span></p>
<p>As others have pointed out, you can uses the different "Add Rectangle" modes in the "Shape Digitizing Toolbars", e.g. "Add Rectangle from 3 points".</p>
<p><span style="color:#000000">Hope this helps,</span></p>
<p><span style="color:#000000">Andreas</span></p>
<p><br></p>
<p id="m_-84224297885618719reply-intro">On 2021-05-05 20:38, Gabriel Cotlier wrote:</p>
<blockquote type="cite" style="padding:0 0.4em;border-left:#1010ff 2px solid;margin:0">
<div id="m_-84224297885618719replybody1">
<div>
<div dir="ltr">Hello,
<div> </div>
<div>I'm digitizing a square using the advanced digitizing tool, however when I'm about to close the rectangle's last angle, the tool doesn't offer me to see how to close it with a perfect square angle at the last click. Thus cannot finish the figure as a perfect square (four 90 degree angles).</div>
<div> </div>
<div>How can I perform the square with the 4 perfect 90 degree angles using the digitizing tool?</div>
<div> </div>
<div>Thanks a lot for your help.</div>
<div>Kind regards,</div>
<div>Gabriel</div>
<div> </div>
<div> </div>
</div>
</div>
</div>
<br>
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