Re: [postgis-users] Dumping out points in a linestring
On Jul 10, 2012, at 12:24 AM, Ed Linde edoli...@gmail.com wrote: Thanks, is there a way to then dump out inflection points in postgis? Don't know off the top of my head. Perhaps there is a way to simplify the line so all points that don't change the slope are removed. Then you can dump the resulting line. On Mon, Jul 9, 2012 at 3:13 PM, Mr. Puneet Kishor punk.k...@gmail.com wrote: On Jul 9, 2012, at 6:37 PM, Ed Linde wrote: Thanks Nicolas. I was wondering what these points in the linestring symbolize? Are the default set of points on a 2D linestring indicating the positions at which the line is not straight and changes directions? Points making up a linestring are just that, points. They have no relationship to whether or not the line changes direction. Consider... +-+-+---+ '+' are points defining the linestring that is symbolized by '+' and '-', but there is no change in direction, no inflection point. -- Puneet Kishor ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
Re: [postgis-users] Dumping out points in a linestring
Hi st_dumpPoints(geom) Nicolas On 9 July 2012 12:51, Ed Linde edoli...@gmail.com wrote: Hi All, Wondering how I can dump out all the points within a linestring or multilinestring? Thanks, Ed ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
Re: [postgis-users] Dumping out points in a linestring
Thanks Nicolas. I was wondering what these points in the linestring symbolize? Are the default set of points on a 2D linestring indicating the positions at which the line is not straight and changes directions? On Mon, Jul 9, 2012 at 2:33 PM, Nicolas Ribot nicolas.ri...@gmail.comwrote: Hi st_dumpPoints(geom) Nicolas On 9 July 2012 12:51, Ed Linde edoli...@gmail.com wrote: Hi All, Wondering how I can dump out all the points within a linestring or multilinestring? Thanks, Ed ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
Re: [postgis-users] Dumping out points in a linestring
On Jul 9, 2012, at 6:37 PM, Ed Linde wrote: Thanks Nicolas. I was wondering what these points in the linestring symbolize? Are the default set of points on a 2D linestring indicating the positions at which the line is not straight and changes directions? Points making up a linestring are just that, points. They have no relationship to whether or not the line changes direction. Consider... +-+-+---+ '+' are points defining the linestring that is symbolized by '+' and '-', but there is no change in direction, no inflection point. -- Puneet Kishor ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
Re: [postgis-users] Dumping out points in a linestring
Thanks, is there a way to then dump out inflection points in postgis? On Mon, Jul 9, 2012 at 3:13 PM, Mr. Puneet Kishor punk.k...@gmail.comwrote: On Jul 9, 2012, at 6:37 PM, Ed Linde wrote: Thanks Nicolas. I was wondering what these points in the linestring symbolize? Are the default set of points on a 2D linestring indicating the positions at which the line is not straight and changes directions? Points making up a linestring are just that, points. They have no relationship to whether or not the line changes direction. Consider... +-+-+---+ '+' are points defining the linestring that is symbolized by '+' and '-', but there is no change in direction, no inflection point. -- Puneet Kishor ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users ___ postgis-users mailing list postgis-users@postgis.refractions.net http://postgis.refractions.net/mailman/listinfo/postgis-users
