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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='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Daniel,<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'>I’m unclear what you want the outcome to be. What’s wrong with ST_Clip if you want to clip the raster? That is the most efficient way to clip a raster.<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><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><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-users [mailto:postgis-users-bounces@lists.osgeo.org] <b>On Behalf Of </b>Daniel Vignoles<br><b>Sent:</b> Wednesday, May 27, 2020 10:36 AM<br><b>To:</b> postgis-users@lists.osgeo.org<br><b>Subject:</b> [postgis-users] Raster Clipping vs Masking<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Hello Postgis-users, <o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>I'm looking to find out the most efficient method of clipping/masking a raster with a geometry in postgis. </span><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>Inputs:</span><o:p></o:p></p></div><div><ul type=disc><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1'><span style='font-family:"Calibri",sans-serif'>Multi-band raster</span><o:p></o:p></li></ul></div><div><ul type=disc><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l0 level1 lfo1'><span style='font-family:"Calibri",sans-serif'>Geometry</span><o:p></o:p></li></ul></div><div><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>Output:</span><o:p></o:p></p></div><div><ul type=disc><li class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;mso-list:l1 level1 lfo2'><span style='font-family:"Calibri",sans-serif'>All pixels of all bands of the raster which intersect with the geometry</span><o:p></o:p></li></ul></div><div><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>So far I have been using the ST_Clip(raster, geom) function.Do you know if there is a way to simply mask the raster with the geometry, rather than perform a clip operation? Would St_Intersection be more appropriate? I'd like to optimize this function as much as possible. Any thoughts/ideas? </span><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>Thank you,</span><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-family:"Calibri",sans-serif'>Daniel Vignoles</span><o:p></o:p></p></div></div><p class=MsoNormal><img id="_x0000_i1025" src="https://link.getmailspring.com/open/CFCCCA62-D66A-4F25-9BDB-02D76EF6D93A@getmailspring.com?me=5e4c3d4a&recipient=cG9zdGdpcy11c2Vyc0BsaXN0cy5vc2dlby5vcmc%3D" alt="Sent from Mailspring"><o:p></o:p></p></div></div></body></html>