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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Alexander,<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 would want to check out ST_BUFFER, which is doing what you intend to do.<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'>Guido<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'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> postgis-users-bounces@lists.osgeo.org [mailto:postgis-users-bounces@lists.osgeo.org] <b>On Behalf Of </b>Alexander W. Rolek<br><b>Sent:</b> 09 July 2014 05:36<br><b>To:</b> postgis-users@lists.osgeo.org; Jeffrey Johnson<br><b>Subject:</b> [postgis-users] Finding records withing XX distance from a geometry in the same table<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>I'm trying to query all the records within XX distance from a geometry. I would like to be able to reference the subject geometry via it's id, and then find every geometry that is either:<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>A) within XX distance from a x/y coordinate of the geometry<o:p></o:p></p></div><div><p class=MsoNormal>B) within XX distance from the edge of the geometry on all sides. (ideal)<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>What is the best way to accomplish this? My current query:<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><p class=MsoNormal>SELECT *<o:p></o:p></p></div><div><p class=MsoNormal> FROM sdgis.parcels4326 AS parcels<o:p></o:p></p></div><div><p class=MsoNormal> WHERE ST_Distance_Sphere(<o:p></o:p></p></div><div><p class=MsoNormal> parcels.geom,<o:p></o:p></p></div><div><p class=MsoNormal> ST_Transform(ST_SetSRID(ST_MakePoint('6255896.314288','1898596.929109'),2230),4326)<o:p></o:p></p></div><div><p class=MsoNormal> ) < 100.0;<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>This takes a few minutes to run on a table with just over 1 million records. I would like to swap out the ST_MakePoint, with a multipolygon from a record that is looked up via it's id. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Any suggestions are greatly appreciated.<o:p></o:p></p></div><div><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal style='margin-bottom:12.0pt'>-- <br>Alexander W. Rolek<o:p></o:p></p></div></div></div></div></body></html>