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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Heyho.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">So, there is no native support in PostGIS to interpolate a Spline/Bezier (e.g. for smoothing purposes). In my previous post to this thread (http://postgis.17.x6.nabble.com/Bezier-or-Spline-smoothing-implementation-tp4717217p5004219.html)
I gave an example on how to create a PostgreSQL PL/R function which calculates such a desired spline with R and exposes the result as a regular PostGIS geometry. It can be directly used in your SQL-queries like any other function. You put in a coarse LineString
and get a smoothed curve back.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Michi<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Von:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> postgis-users-bounces@lists.osgeo.org [mailto:postgis-users-bounces@lists.osgeo.org]
<b>Im Auftrag von </b>Stefan Keller<br>
<b>Gesendet:</b> Donnerstag, 19. September 2013 11:59<br>
<b>An:</b> PostGIS Users Discussion<br>
<b>Betreff:</b> Re: [postgis-users] Bezier or Spline smoothing implementation<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span lang="EN-US">Good you pointed to ST_Line_Interpolate. </span>
The use case I have in mind is that I have e.g. roads and want to smooth ithem before they are being rendered. <o:p></o:p></p>
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