[Qgis-user] Subsurface-Polygons

Uhlmann, Lars lars.uhlmann at fau.de
Fri Dec 12 02:23:55 PST 2025


Hi to everyone!

My name is Lars Uhlmann and I am studying Geothermics at the Technical 
University of Munich and at the Friedrich-Alexander University of 
Erlangen-Nürnberg. At the moment I am doing my Master Thesis with the 
topic "Creation of a subsurface model for Erlangen and derivation of 
geothermal potential".

That is why I am writing this email, as I need help with how to display 
the underground model in QGIS.

I believe that it is possible to represent the thermal conductivity of 
the subsurface in subsurface polygons down to a depth of 50 metres. The 
Problem is that I dont know how to do that by myself.

Just a quick addition to give you a better idea of the data basis. I 
have around 400 boreholes in the urban area of Erlangen (80 km²) with 
depths ranging from 1 to 200 metres. These are very well documented 
stratigraphically (in some cases in 1 m increments). I would like to 
connect these layers and then, for example, form a 2D surface of the 
subsoil every 5 metres in order to map the thermal conductivities there. 
The data is available as an Excel file.
Please feel free to write to me if you need further information.

It would be very helpful for me if someone could tell me whether this is 
possible in QGIS and either provide instructions, a YouTube video or 
perhaps offer their own help!

You can reach me by this email lars.uhlmann at fau.de or at this number_ 
+49 1766 444 1849 in English or German.

Many thanks for every reply and kind regards,

Lars Uhlmann :)


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