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I have a set of points (X,Y,Z) across a river. Is there a way to present them as a cross section? I'm attaching a cross section I made in Excel: The X axis are the longtitude and the Y axis, the Z elevation data. I want to make such a cross section in QGIS. enter image description here

H.Wiener
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    Can you add a drawing to illustrate what you want to achieve? – AndreJ Aug 11 '14 at 07:54
  • You need a general plotting library for this - so you could either use R or Python, and then write a script for the Processing module to get the data from your layer and plot. – Spacedman Nov 03 '16 at 08:45

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In a first step, you should convert your point layer into a DEM raster: Creating raster or vector raster from DEM point file? or How to rasterize a vector map?

Then you can follow this advice: Drawing cross section in QGIS?

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AndreJ
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  • Thanks Andre, but this is exactly what I'm trying to avoid. The data points I have are too few and too scattered for creating a reasonable raster. – H.Wiener Aug 12 '14 at 12:35
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    If they are not part of the cross-section cutline, QGIS has to interpolate between them. And the rasterize tool does exactly the same. – AndreJ Aug 12 '14 at 12:41