<div dir="ltr">Hi there<div><br></div><div>I've been looking into this, but not sure about the best way to do it:</div><div><br></div><div>I have a set of points that lie over a line (the line is a river course and points are intersections with contour lines). I want to order the points 'downstream', so I can make a long profile of the river (just sampling elevations from a DEM at line nodes gives too much noise, some papers suggest contours intersections work better).</div>
<div><br></div><div>Question is: how? After some searching I found the Network Analysis of QGIS, but still not sure if that's the best approach. The river is very meandering, so nearest neighbour won't work because the nearest node might not be the next one downstream</div>
<div><br></div><div>I'm open to suggestions</div><div><br></div><div>thanks</div><div><br></div><div>Carlos</div><div><br></div><div><br></div><div><br clear="all"><div><br></div>-- <br>Prof. Carlos Henrique Grohmann<br>
Institute of Geosciences - Univ. of São Paulo, Brazil<div>- Digital Terrain Analysis | GIS | Remote Sensing - </div><div><br></div><div><a href="http://carlosgrohmann.com/" target="_blank">http://carlosgrohmann.com</a></div>
<div><a href="http://orcid.org/0000-0001-5073-5572" style="font-size:13px;color:rgb(17,85,204);font-family:arial,sans-serif;background-color:rgb(255,255,255)" target="_blank">http://orcid.org/0000-0001-5073-5572</a><br><div>
________________<br>Can’t stop the signal.</div></div>
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