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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D'><img width=269 height=110 id="Image_x0020_1" src="cid:image001.png@01D2B459.38C1CE00"></span><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>De :</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> postgis-users [mailto:postgis-users-bounces@lists.osgeo.org] <b>De la part de</b> franco base<br><b>Envoyé :</b> jeudi 13 avril 2017 13:08<br><b>À :</b> PostGIS Users Discussion<br><b>Objet :</b> Re: [postgis-users] st_distance meter/degree<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><div><p class=MsoNormal>Sorry.<o:p></o:p></p></div><p class=MsoNormal>I don't see the <span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D'>10-5at the end </span><o:p></o:p></p></div><p class=MsoNormal><span lang=EN-US style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:#1F497D'>very sorry</span><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>2017-04-13 13:05 GMT+02:00 Jorge Gustavo Rocha <<a href="mailto:jgr@di.uminho.pt" target="_blank">jgr@di.uminho.pt</a>>:<o:p></o:p></p><p class=MsoNormal>Hi Franco,<br><br>I did not understood your question.<br><br>Postgis calculates the distance/area according to the CRS unit. It the<br>CRS unit is degrees, the results is in degrees. If the CRS unit is<br>meter, the result is in meter.<br><br>For example, if you transform the geometry, like:<br>SELECT ST_Distance(ST_Transform(geometry, 25829)) ...<br>the result will be in meter.<br><br>Regards,<br><br>Jorge<br><br>Às 11:54 de 13-04-2017, franco base escreveu:<br>> Thanks Jorge but it isn't the matter.<br>> I'd know why postgis have a different way to calculate the distance<br>> with the same sql query.<br>><br>> 2017-04-13 12:37 GMT+02:00 Jorge Gustavo Rocha <<a href="mailto:jgr@di.uminho.pt">jgr@di.uminho.pt</a><br>> <mailto:<a href="mailto:jgr@di.uminho.pt">jgr@di.uminho.pt</a>>>:<br>><br>> Hi Franco,<br>><br>> You can use the usual control statements IF THEN ELSE [1] to make it<br>> exactly like you want.<br>><br>> [1]<br>> <a href="https://www.postgresql.org/docs/current/static/plpgsql-control-structures.html" target="_blank">https://www.postgresql.org/docs/current/static/plpgsql-control-structures.html</a><br>> <<a href="https://www.postgresql.org/docs/current/static/plpgsql-control-structures.html" target="_blank">https://www.postgresql.org/docs/current/static/plpgsql-control-structures.html</a>><br>><br>> Regards,<br>><br>> Jorge<br>><br>> Às 10:57 de 13-04-2017, franco base escreveu:<br>> > Hi all.<br>> > Is it possible that st_distance between point return meter distance if<br>> > point are very close and degrees otherwise?<br>> ><br>> > SELECT ST_distance ( ST_SetSRID<br>> > (ST_MakePoint(45.4553804010375,9.11292550791171) ,4326), ST_SetSRID<br>> > (ST_MakePoint(45.4553855607023,9.11291318106981) ,4326))<br>> ><br>> > return 1.3 ( meter distance)<br>> ><br>> ><br>> > SELECT ST_distance ( ST_SetSRID<br>> > (ST_MakePoint(45.4553804010375,9.11292550791171) ,4326), ST_SetSRID<br>> > (ST_MakePoint(45.4560699405679,9.1164832309759) ,4326))<br>> ><br>> > return 0.003 (degrees distance)<br>> ><br>> ><br>> > Thanks<br>> > fb<br>> ><br>> ><br>> ><br>> ><br>> ><br>> > _______________________________________________<br>> > postgis-users mailing list<br>> > <a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a> <mailto:<a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a>><br>> > <a href="https://lists.osgeo.org/mailman/listinfo/postgis-users" target="_blank">https://lists.osgeo.org/mailman/listinfo/postgis-users</a><br>> <<a href="https://lists.osgeo.org/mailman/listinfo/postgis-users" target="_blank">https://lists.osgeo.org/mailman/listinfo/postgis-users</a>><br>> ><br>><br>> J. Gustavo<br>> --<br>> Jorge Gustavo Rocha<br>> Departamento de Informática<br>> Universidade do Minho<br>> 4710-057 Braga<br>> Tel: <a href="tel:%2B351%20253604480">+351 253604480</a> <<a href="tel:%2B351%20253604480">tel:%2B351%20253604480</a>><br>> Fax: <a href="tel:%2B351%20253604471">+351 253604471</a> <<a href="tel:%2B351%20253604471">tel:%2B351%20253604471</a>><br>> Móvel: <a href="tel:%2B351%20910333888">+351 910333888</a> <<a href="tel:%2B351%20910333888">tel:%2B351%20910333888</a>><br>> skype: nabocudnosor<br>> _______________________________________________<br>> postgis-users mailing list<br>> <a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a> <mailto:<a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a>><br>> <a href="https://lists.osgeo.org/mailman/listinfo/postgis-users" target="_blank">https://lists.osgeo.org/mailman/listinfo/postgis-users</a><br>> <<a href="https://lists.osgeo.org/mailman/listinfo/postgis-users" target="_blank">https://lists.osgeo.org/mailman/listinfo/postgis-users</a>><o:p></o:p></p><div><div><p class=MsoNormal>><br>><br>><br>><br>> _______________________________________________<br>> postgis-users mailing list<br>> <a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a><br>> <a href="https://lists.osgeo.org/mailman/listinfo/postgis-users" target="_blank">https://lists.osgeo.org/mailman/listinfo/postgis-users</a><br>><br><br>J. Gustavo<br>--<br>Jorge Gustavo Rocha<br>Departamento de Informática<br>Universidade do Minho<br>4710-057 Braga<br>Tel: <a href="tel:%2B351%20253604480">+351 253604480</a><br>Fax: <a href="tel:%2B351%20253604471">+351 253604471</a><br>Móvel: <a href="tel:%2B351%20910333888">+351 910333888</a><br>skype: nabocudnosor<br>_______________________________________________<br>postgis-users mailing list<br><a href="mailto:postgis-users@lists.osgeo.org">postgis-users@lists.osgeo.org</a><br><a href="https://lists.osgeo.org/mailman/listinfo/postgis-users" target="_blank">https://lists.osgeo.org/mailman/listinfo/postgis-users</a><o:p></o:p></p></div></div></div><p class=MsoNormal><o:p> </o:p></p></div></div><div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br /> <table style="border-top: 1px solid #D3D4DE;">
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