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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks everyone!<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">Från:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> postgis-users [mailto:postgis-users-bounces@lists.osgeo.org]
<b>För </b>didier peeters<br>
<b>Skickat:</b> den 4 juli 2019 14:46<br>
<b>Till:</b> PostGIS Users Discussion<br>
<b>Ämne:</b> Re: [postgis-users] creating points from polygons, storing all attributes<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">That’s because you named the new geometry « the_geom » like the old one, and using « * » gets you all the attributes including « the_geom » . So either you list all the attributes you want to keep in the SELECT instead of using the « * »
like this :<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">CREATE TABLE NewPointLayer AS </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">SELECT</span><span style="font-size:10.0pt;font-family:Consolas;background:#F5EC00"> attr1, attr2, attr3, attr4,</span><span style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE"> ST_PointOnSurface(the_geom)::geometry(Point,32632)
AS the_geom </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">FROM OldPolygonLayer</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">, or you use another name for your new geometry and you drop the old geometry afterward (if you don’t want to have these 2 different geometry columns in your new table), like this :<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">CREATE TABLE NewPointLayer AS </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">SELECT </span><span style="font-size:10.0pt;font-family:Consolas;background:yellow">*,</span><span style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE"> ST_PointOnSurface(the_geom)::geometry(Point,32632)
AS </span><span style="font-size:10.0pt;font-family:Consolas;background:#F5EC00">geom</span><span style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE"> </span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">FROM OldPolygonLayer ;</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">ALTER TABLE NewPointLayer</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">DROP COLUMN the_geom;</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Didier<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Le 4 juil. 2019 à 14:26, <a href="mailto:paul.malm@lfv.se">paul.malm@lfv.se</a> a écrit :<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thanks, I’ve tried that but get this error:</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:9.5pt;font-family:Consolas;color:#222222;background:white">ERROR: column "the_geom" is specified more than once SQL state: 42701</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:9.5pt;font-family:Consolas;color:#222222;background:white">/Paul</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><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"">Från:</span></b><span class="apple-converted-space"><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> </span></span><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">postgis-users
[<a href="mailto:postgis-users-bounces@lists.osgeo.org"><span style="color:purple">mailto:postgis-users-bounces@lists.osgeo.org</span></a>]<span class="apple-converted-space"> </span><b>För<span class="apple-converted-space"> </span></b>Derek Watling<br>
<b>Skickat:</b><span class="apple-converted-space"> </span>den 4 juli 2019 13:55<br>
<b>Till:</b><span class="apple-converted-space"> </span>PostGIS Users Discussion<br>
<b>Ämne:</b><span class="apple-converted-space"> </span>Re: [postgis-users] creating points from polygons, storing all attributes</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">CREATE TABLE NewPointLayer AS SELECT<span class="apple-converted-space"> </span></span><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:yellow">*,</span><span class="apple-converted-space"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE"> </span></span><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">ST_PointOnSurface(the_geom)::geometry(Point,32632)
AS the_geom FROM OldPolygonLayer</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-ZA" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span class="apple-converted-space"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">postgis-users
<<a href="mailto:postgis-users-bounces@lists.osgeo.org"><span style="color:purple">postgis-users-bounces@lists.osgeo.org</span></a>><span class="apple-converted-space"> </span><b>On Behalf Of<span class="apple-converted-space"> </span></b><a href="mailto:paul.malm@lfv.se"><span style="color:purple">paul.malm@lfv.se</span></a><br>
<b>Sent:</b><span class="apple-converted-space"> </span>Thursday, 04 July 2019 13:47<br>
<b>To:</b><span class="apple-converted-space"> </span><a href="mailto:postgis-users@lists.osgeo.org"><span style="color:purple">postgis-users@lists.osgeo.org</span></a><br>
<b>Subject:</b><span class="apple-converted-space"> </span>[postgis-users] creating points from polygons, storing all attributes</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-ZA" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Hi,</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif"">I would like to create a point table from a polygon table. One point in each polygon</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">Query = CREATE TABLE NewPointLayer AS SELECT ST_PointOnSurface(the_geom)::geometry(Point,32632) AS the_geom FROM OldPolygonLayer</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE"> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">But how do I write the query to get all the attributes from OldPolygonLayer to the NewPointLayer?</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE"> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif";background:#E8F2FE">Thanks in advance,</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;background:#E8F2FE">Paul</span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:Consolas;color:#BB005E;background:#E8F2FE"> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Helvetica","sans-serif"">_______________________________________________<br>
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<p class="MsoNormal"><o:p> </o:p></p>
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