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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'>-1 – please no more questionable functions we might need to take out in 3.1.0 release.<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'>Let’s be content with what we have already with the new gridSize args strk introduced and focus on bullet testing the geos 3.9.<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'>The reality is a good chunk of people aren’t going to be using GEOS 3.9 in PostGIS 3.1 so you are creating a bunch of features that few can use and that yikes you might kick yourself in the ass when you realize you don’t like the new names you came up with.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Let’s just put all this dreamy talk into the 3.2 release milestone. PLEASE<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'>Thanks,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D'>Regina<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-devel [mailto:postgis-devel-bounces@lists.osgeo.org] <b>On Behalf Of </b>Darafei "Kom?pa" Praliaskouski<br><b>Sent:</b> Wednesday, November 11, 2020 11:53 AM<br><b>To:</b> PostGIS Development Discussion <postgis-devel@lists.osgeo.org><br><b>Subject:</b> Re: [postgis-devel] Precision Reduction?<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>Regarding naming: we already have duality of ST_Simplify <-> ST_SimplifyPreserveTopology, so if we want to follow it as an agreement, it has to be ST_SnapToGridPreserveTopology. If that looks wrong then we may want to consider the exposure of this function together with naming ST_SimplifyPreserveTopology.<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Another recent precision reducer we have is ST_QuantizeCoordinates. Can GEOS be bent to provide the same behavior on a non-even grid with last bits set to 0 with guarantees on validity of output?<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Wed, Nov 11, 2020 at 7:27 PM Martin Davis <<a href="mailto:mtnclimb@gmail.com">mtnclimb@gmail.com</a>> wrote:<o:p></o:p></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div><p class=MsoNormal>I am neutral about encoding precision in the data or in the schema. As Darafei points out it raises a raft of tricky questions about what should be made precise, the semantics of spatial predicates, and what to do about mixed precision. It's a far bigger change than what Paul is asking about, since it requires many operations to be enhanced to support precise output.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Providing ST_PrecisionReduce may or may not be a small step in that direction. But it lets users and the development team get some experience with how and when to enforce precision. <o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On Wed, Nov 11, 2020 at 2:06 AM Sandro Santilli <<a href="mailto:strk@kbt.io" target="_blank">strk@kbt.io</a>> wrote:<o:p></o:p></p></div><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>I think we should add a precision field to the Geometry type<br>so that once precision is set on a geometry it sticks and can<br>be passed around, in particular to GEOS functions for retaining<br>the precision in output (basically using fixed precision all<br>the way).<o:p></o:p></p></blockquote></div></div><p class=MsoNormal>_______________________________________________<br>postgis-devel mailing list<br><a href="mailto:postgis-devel@lists.osgeo.org" target="_blank">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></blockquote></div><p class=MsoNormal><br clear=all><o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><p class=MsoNormal>-- <o:p></o:p></p><div><div><p class=MsoNormal>Darafei "Komяpa" Praliaskouski<br>OSM BY Team - <a href="http://openstreetmap.by/" target="_blank">http://openstreetmap.by/</a><o:p></o:p></p></div></div></div></div></body></html>