<html><head></head><body bgcolor="#FFFFFF"><div><br></div><div><br>On Jul 10, 2012, at 12:24 AM, Ed Linde <<a href="mailto:edolinde@gmail.com">edolinde@gmail.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div>Thanks, is there a way to then dump out inflection points in postgis?<br></div></blockquote><div><br></div><div><br></div><div><br></div>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.<div><br></div><div><br><blockquote type="cite"><div><br><div class="gmail_quote">On Mon, Jul 9, 2012 at 3:13 PM, Mr. Puneet Kishor <span dir="ltr"><<a href="mailto:punk.kish@gmail.com" target="_blank">punk.kish@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im"><br>
On Jul 9, 2012, at 6:37 PM, Ed Linde wrote:<br>
<br>
> Thanks Nicolas. I was wondering what these points in the linestring<br>
> symbolize? Are the default set of points on a 2D linestring<br>
> indicating the positions at which the line is not straight and changes<br>
> directions?<br>
<br>
<br>
</div>Points making up a linestring are just that, points. They have no relationship to whether or not the line changes direction. Consider...<br>
<br>
<br>
+---------+-------------+---------------+<br>
<br>
'+' are points defining the linestring that is symbolized by '+' and '-', but there is no change in direction, no inflection point.<br>
<br>
<br>
--<br>
Puneet Kishor<br>
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