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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Opps wrong address sent for Geos.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><br><b>Sent:</b> Monday, October 5, 2020 3:21 PM<br><b>To:</b> 'PostGIS Development Discussion' <postgis-devel@lists.osgeo.org><br><b>Cc:</b> 'geos-devel-bounces@lists.osgeo.org' <geos-devel-bounces@lists.osgeo.org><br><b>Subject:</b> When did ST_BuildArea change<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoPlainText>I noticed this before but came across it again.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><a href="http://postgis.net/docs/manual-dev/ST_BuildArea.html">http://postgis.net/docs/manual-dev/ST_BuildArea.html</a><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>At the time I created this page which I am guessing was like circa 2008<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>This query created a gaping hole. Now it doesn't so the docs are wrong<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>SELECT ST_BuildArea(ST_Collect(line,circle))<o:p></o:p></p><p class=MsoPlainText>FROM (SELECT<o:p></o:p></p><p class=MsoPlainText> ST_Buffer(<o:p></o:p></p><p class=MsoPlainText> ST_MakeLine(ST_MakePoint(10, 10),ST_MakePoint(190, 190)),<o:p></o:p></p><p class=MsoPlainText> 5) As line,<o:p></o:p></p><p class=MsoPlainText> ST_Buffer(ST_GeomFromText('POINT(100 90)'), 50) As circle) As foo;<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>--this creates the same gaping hole<o:p></o:p></p><p class=MsoPlainText>--but using linestrings instead of polygons<o:p></o:p></p><p class=MsoPlainText>SELECT ST_BuildArea(<o:p></o:p></p><p class=MsoPlainText> ST_Collect(ST_ExteriorRing(line),ST_ExteriorRing(circle))<o:p></o:p></p><p class=MsoPlainText> )<o:p></o:p></p><p class=MsoPlainText>FROM (SELECT ST_Buffer(<o:p></o:p></p><p class=MsoPlainText> ST_MakeLine(ST_MakePoint(10, 10),ST_MakePoint(190, 190))<o:p></o:p></p><p class=MsoPlainText> ,5) As line,<o:p></o:p></p><p class=MsoPlainText> ST_Buffer(ST_GeomFromText('POINT(100 90)'), 50) As circle) As foo;<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Docs say this:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><img border=0 width=199 height=199 id="Picture_x0020_1" src="cid:image001.png@01D69B2A.32B039F0" alt="http://postgis.net/docs/manual-dev/images/st_buildarea02.png"><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>But when I run in pgAdmin4 I get this:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><img border=0 width=243 height=239 id="Picture_x0020_2" src="cid:image002.png@01D69B2A.32B039F0"><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Does anyone know when this behavior changed and why? I’m assuming it is a GEOS change, so cc’ing GEOS dev as well.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>More depressing is my signature symmetric podded Bee Hive on this page (circa 2010(<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><a href="http://postgis.net/docs/manual-dev/ST_LongestLine.html">http://postgis.net/docs/manual-dev/ST_LongestLine.html</a><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Which looked like this (minus the longest line of course) – beautiful isn’t it?<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><img border=0 width=199 height=199 id="Picture_x0020_3" src="cid:image003.png@01D69B2A.794ADF50" alt="http://postgis.net/docs/manual-dev/images/st_longestline03.png"><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Now looks like a shadow of its former self<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><img border=0 width=181 height=202 id="Picture_x0020_4" src="cid:image004.png@01D69B2A.DACFC6F0"><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Thanks,<o:p></o:p></p><p class=MsoPlainText>Regina<o:p></o:p></p></div></body></html>