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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Dan,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>You should really just call it - </span>ST_ForcePolygonsClockwiseExteriorRingAndCounterClockwiseInteriorRings<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>strk just loves to type <span style='font-family:Wingdings'>J</span><o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>He may ask you to remove the ST_ though.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Sorry couldn't resist.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='margin-left:.5in'><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif'> postgis-devel [mailto:postgis-devel-bounces@lists.osgeo.org] <b>On Behalf Of </b>Daniel Baston<br><b>Sent:</b> Wednesday, February 08, 2017 3:35 PM<br><b>To:</b> PostGIS Development Discussion <postgis-devel@lists.osgeo.org><br><b>Subject:</b> Re: [postgis-devel] RFC - Orientation checking and forcing functions<o:p></o:p></span></p><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><div><div><p class=MsoNormal style='margin-left:.5in'>I'll try to see if I can come up with a less ambiguous name, without resorting to ST_ForcePolygonsClockwiseExteriorRingAndCounterClockwiseInteriorRings, but I'll also note that the proposed terminology has been used by PostGIS internally since 2010:<o:p></o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'><a href="https://github.com/postgis/postgis/commit/2d07d7eb59d2bb8db9d4773cd84619cd696bc471">https://github.com/postgis/postgis/commit/2d07d7eb59d2bb8db9d4773cd84619cd696bc471</a><o:p></o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p></div><div><p class=MsoNormal style='margin-left:.5in'>Dan<o:p></o:p></p><div><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p></div></div></div><div><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p><div><p class=MsoNormal style='margin-left:.5in'>On Wed, Feb 8, 2017 at 3:17 PM, Sandro Santilli <<a href="mailto:strk@kbt.io" target="_blank">strk@kbt.io</a>> wrote:<o:p></o:p></p><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><p class=MsoNormal style='margin-left:.5in'>On Wed, Feb 08, 2017 at 03:05:33PM -0500, Daniel Baston wrote:<br>> The idea was that adding functions with different names would be helpful,<br>> because "RHR" and "LHR" mean different things to different people (and<br>> therefore don't mean much of anything.)<br><br>In PostGIS "RHR" and "LHR" have well-documented meaning, right ?<br><br>> See, for example, the fourth bullet under<br>> <a href="https://tools.ietf.org/html/rfc7946#section-3.1.6" target="_blank">https://tools.ietf.org/html/rfc7946#section-3.1.6</a><br><br>The Wikipedia definition of the rule is about 3d and implies a 3D space,<br>which is not always the case within PostGIS geometries:<br><a href="https://en.wikipedia.org/wiki/Right-hand_rule" target="_blank">https://en.wikipedia.org/wiki/Right-hand_rule</a><br><br>If you find a name/label which means the same to everybody I'll be<br>happy to see a wrapper function using it. "Clockwise" for a polygon<br>with holes doesn't seem to be unambiguous to me (it could for example<br>mean "all rings are clockwise"...)<o:p></o:p></p><div><div><p class=MsoNormal style='margin-left:.5in'><br>--strk;<br>_______________________________________________<br>postgis-devel mailing list<br><a href="mailto:postgis-devel@lists.osgeo.org">postgis-devel@lists.osgeo.org</a><br><a href="https://lists.osgeo.org/mailman/listinfo/postgis-devel" target="_blank">https://lists.osgeo.org/mailman/listinfo/postgis-devel</a><o:p></o:p></p></div></div></blockquote></div><p class=MsoNormal style='margin-left:.5in'><o:p> </o:p></p></div></div></body></html>