Apologies if this is an obvious question, but I can’t seem to find a solution. When looking at a cross section, is there a way of exaggerating the vertical height/Z scale? This is an image of what we think might be a Roman marching camp but, as you can see from the image, the height variation is extremely subtle, such that it does not display on the section chart. Is there a means of altering the scale on the charts y axis to just display the height variation I am interested in? Thanks in advance.
As always I recommend QGis.
Open a new project, attach the raster and use the raster calculator. I would take every hight multiplied with 2 or 3.
You can also use different colouring to se differences better.
Absolutely QGIS. Hillshade with a very low lighting angle and 2 or 3 on the vertical exaggeration.
It is specifically the section tool I am interested in, rather than a visual display. I have processed the dsm in QGIS which shows the features beautifully, but I quite like the split screen option in WebODM to show the graph/cross-section. It is the scale of the latter I am trying to tweak.
Modern versions of QGIS have an amazing version of that tool built-in, and can even do it off the Pointcloud directly
So I take it that it can’t be adjusted in WebODM, then?
No, but if you are looking for these kinds of latent structures you are going to want to use a tool that gives you better options for teasing features out of the DEMs and QGIS is great for that. Specifically Hillshade exaggeration with a very low lighting angle.
I have already done that using the Relief Visualisation Toolbox. What I am specifically trying to see is a 2d cross section/profile of the features.
There’s good plug-ins for that in QGis
Yes - there is. But I was wondering whether I could do this in WebODM.
No, we currently don’t have a means to exaggerate axes or features, beyond adjusting histogram bounds for display in the 2D Map view.
Thanks for clarifying that for me. This is what I am doing in QGIS, but was hoping to be able to do it in WebODM, as it looks “nicer” in WebODM.
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