<div dir="ltr">Ack! The example is indeed wrong. Shall I email the RFC Editor directly about this? That's the only way to change it at this point, correct?<br></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jul 14, 2016 at 4:15 AM, GeoJSON <span dir="ltr"><<a href="mailto:geojson@geojson.org" target="_blank">geojson@geojson.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>I'll let Anna know that we are a subscriber-only-can-post list (although, for the life of me, I can't remember why). But she does have a point, no?<br><br></div>Martin<br><br><br><div><div><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername"></b> <span dir="ltr"><<a href="mailto:geojson-bounces@lists.geojson.org" target="_blank">geojson-bounces@lists.geojson.org</a>></span><br>Date: 13 July 2016 at 09:50<br>Subject: Auto-discard notification<br>To: <a href="mailto:geojson-owner@lists.geojson.org" target="_blank">geojson-owner@lists.geojson.org</a><br><br><br>The attached message has been automatically discarded.<br><br>---------- Forwarded message ----------<br>From: Anna Eivazi <<a href="mailto:Anna.Eivazi@sharpershape.com" target="_blank">Anna.Eivazi@sharpershape.com</a>><br>To: "<a href="mailto:geojson@lists.geojson.org" target="_blank">geojson@lists.geojson.org</a>" <<a href="mailto:geojson@lists.geojson.org" target="_blank">geojson@lists.geojson.org</a>><br>Cc: <br>Date: Wed, 13 Jul 2016 08:50:49 +0000<br>Subject: polygon orientation<br>
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<p class="MsoNormal">Hello geojson-gurus,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">First of all, thank you for all your good work about geojson, we love to use it!;)<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">I’ve got a question after trying to figure out which orientation to use for polygons.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">So I’ve read your latest specs: <u></u><u></u></p>
<p class="MsoNormal"><a href="https://datatracker.ietf.org/doc/draft-ietf-geojson/?include_text=1" target="_blank">https://datatracker.ietf.org/doc/draft-ietf-geojson/?include_text=1</a><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Here it is said:<u></u><u></u></p>
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<pre style="margin-bottom:7.9pt;background:#fffdf5;word-break:break-all;border:none;padding:0in"><span style="font-size:10.5pt;color:black">Polygon rings MUST follow the right-hand rule for orientation<u></u><u></u></span></pre>
<pre style="margin-bottom:7.9pt;background:#fffdf5;word-break:break-all;border:none;padding:0in"><span style="font-size:10.5pt;color:black"> (counter-clockwise external rings, clockwise internal rings).<u></u><u></u></span></pre>
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<p class="MsoNormal">(clear answer to my question, right?)<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">But a bit upper in the same doc Polygon section:<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black">A.3. Polygons<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"><u></u> <u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> Coordinates of a Polygon are an array of LinearRing (see<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> Section 3.1.6) coordinate arrays. The first element in the array<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-bottom:7.9pt;background:#fffdf5;word-break:break-all;border:none;padding:0in">
<span style="font-size:10.5pt;font-family:"Courier New";color:black"> represents the exterior ring. Any subsequent elements represent<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> interior rings (or holes).<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"><u></u> <u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> No holes:<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"><u></u> <u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> {<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> "type": "Polygon",<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> "coordinates": [<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> [<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> [100.0, 0.0],<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> [100.0, 1.0],<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-bottom:7.9pt;background:#fffdf5;word-break:break-all;border:none;padding:0in">
<span style="font-size:10.5pt;font-family:"Courier New";color:black"> [101.0, 1.0],<u></u><u></u></span></p>
<p class="MsoNormal" style="margin-bottom:7.9pt;background:#fffdf5;word-break:break-all;border:none;padding:0in">
<span style="font-size:10.5pt;font-family:"Courier New";color:black"> [101.0, 0.0],<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> [100.0, 0.0]<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> ]<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> ]<u></u><u></u></span></p>
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<span style="font-size:10.5pt;font-family:"Courier New";color:black"> }<u></u><u></u></span></p>
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<p class="MsoNormal">That would mean clockwise orientation…?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">So, which one u are planning to use in future? So we will stick to it too!<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Thanks a lot!<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Best regards,<u></u><u></u></p>
<p class="MsoNormal">Anna Eivazi<u></u><u></u></p>
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</blockquote></div><br><br clear="all"><br>-- <br><div class="gmail_signature" data-smartmail="gmail_signature">Sean Gillies</div>
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