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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hello everyone<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’ve been trying to replicate some data in postgis that I have in sql server however the postgis version gives inconsistent results so I’m looking for help to see if I have something wrong.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>So the data I am creating is to segment the globe in to 8 triangles. The nodes are then located at the poles and the 4 “corners” of the equator.<o:p></o:p></p><p class=MsoNormal>I am using the geography type in both databases and wgs84<o:p></o:p></p><p class=MsoNormal>Below I give the text version of the polygons (as they come out of the database using STAsText in sqlserver and ST_AsText in postgis)<o:p></o:p></p><p class=MsoNormal>Also sown is the area of the polygon which is a simple check on the polys.<o:p></o:p></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal>In sql server I have<o:p></o:p></p><p class=MsoNormal>Text Area<o:p></o:p></p><p class=MsoNormal>POLYGON ((0 0, 0 90, -90 0, 0 0)) 63758201600773.2<o:p></o:p></p><p class=MsoNormal>POLYGON ((-90 0, 0 90, 180 0, -90 0)) 63758199375051<o:p></o:p></p><p class=MsoNormal>POLYGON ((180 0, 0 90, 90 0, 180 0)) 63758199375051<o:p></o:p></p><p class=MsoNormal>POLYGON ((90 0, 0 90, 0 0, 90 0)) 63758201600773.2<o:p></o:p></p><p class=MsoNormal>POLYGON ((0 0, 0 -90, 90 0, 0 0)) 63758201600773.2<o:p></o:p></p><p class=MsoNormal>POLYGON ((90 0, 0 -90, -180 0, 90 0)) 63758208279862.1<o:p></o:p></p><p class=MsoNormal>POLYGON ((-180 0, 0 -90, -90 0, -180 0)) 63758203826495.3<o:p></o:p></p><p class=MsoNormal>POLYGON ((-90 0, 0 -90, 0 0, -90 0)) 63758201600773.2<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>In postgis<o:p></o:p></p><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0 width=372 style='width:279.05pt;margin-left:-.75pt;border-collapse:collapse'><tr style='height:15.0pt'><td width=256 nowrap valign=bottom style='width:192.15pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>POLYGON((0 0,0 90,-90 0,0 0))<o:p></o:p></span></p></td><td width=116 nowrap valign=bottom style='width:86.9pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal align=right style='text-align:right'><span style='color:black;mso-fareast-language:EN-GB'>63758234549478.10<o:p></o:p></span></p></td></tr><tr style='height:15.0pt'><td width=256 nowrap valign=bottom style='width:192.15pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>POLYGON((-90 0,0 90,180 0,-90 0))<o:p></o:p></span></p></td><td width=116 nowrap valign=bottom style='width:86.9pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal align=right style='text-align:right'><span style='color:black;mso-fareast-language:EN-GB'>63758234549482.70<o:p></o:p></span></p></td></tr><tr style='height:15.0pt'><td width=256 nowrap valign=bottom style='width:192.15pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>POLYGON((180 0,0 90,90 0,180 0))<o:p></o:p></span></p></td><td width=116 nowrap valign=bottom style='width:86.9pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal align=right style='text-align:right'><span style='color:black;mso-fareast-language:EN-GB'>63758234549478.20<o:p></o:p></span></p></td></tr><tr style='height:15.0pt'><td width=256 nowrap valign=bottom style='width:192.15pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>POLYGON((90 0,0 90,0 0,90 0))<o:p></o:p></span></p></td><td width=116 nowrap valign=bottom style='width:86.9pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal align=right style='text-align:right'><span style='color:black;mso-fareast-language:EN-GB'>148769213948756.00<o:p></o:p></span></p></td></tr><tr style='height:15.0pt'><td width=256 nowrap valign=bottom style='width:192.15pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>POLYGON((0 0,0 -90,90 0,0 0))<o:p></o:p></span></p></td><td width=116 nowrap valign=bottom style='width:86.9pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>NaN<o:p></o:p></span></p></td></tr><tr style='height:15.0pt'><td width=256 nowrap valign=bottom style='width:192.15pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>POLYGON((90 0,0 -90,-180 0,90 0))<o:p></o:p></span></p></td><td width=116 nowrap valign=bottom style='width:86.9pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>NaN<o:p></o:p></span></p></td></tr><tr style='height:15.0pt'><td width=256 nowrap valign=bottom style='width:192.15pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>POLYGON((-180 0,0 -90,-90 0,-180 0))<o:p></o:p></span></p></td><td width=116 nowrap valign=bottom style='width:86.9pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>NaN<o:p></o:p></span></p></td></tr><tr style='height:15.0pt'><td width=256 nowrap valign=bottom style='width:192.15pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>POLYGON((-90 0,0 -90,0 0,-90 0))<o:p></o:p></span></p></td><td width=116 nowrap valign=bottom style='width:86.9pt;padding:0cm 5.4pt 0cm 5.4pt;height:15.0pt'><p class=MsoNormal><span style='color:black;mso-fareast-language:EN-GB'>NaN<o:p></o:p></span></p></td></tr></table><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>So the first three in post gis are similar in area (I assume a slightly different geoid is used) but the 4<sup>th</sup> one is very different and the southern hemisphere are all wrong.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Any ideas?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>