I want to analyse PV potentials of roofing in QGIS (v. 3.16).

I am experienced in vector data analysis but have barely worked with raster data sets. I therefore have no experience and am asking for assistance with the task.

I have access to the digital surface model of Berlin (as WMS layer) through the following link:


I have read previous posts about similar analysis like:

Calculating total PV potential of roof using QGIS

and am wondering if someone could guide me through a similar analysis.

The SAGA toolbox that I can open in QGIS does not offer the Potential Incoming Solar Radiation algorithm.

I have further installed a SAGA standalone (version 7.8.1) that offers the toolkit.

Is there another way to calculate Potential Solar Radiation?

Side note: I have installed the following programs on my computer (OS Windows 10):

  • QGIS (3.16.1.) standalone
  • SAGA (3.8.1.) standalone
  • WinGRASS (7.8.4) standalone
  • Python (3.8.6)
  • 1
    Please read up one what a WMS layer is, how it works, and what its limitations are. Then get back to the Senat-website and check for data downloads. – Erik Nov 25 '20 at 10:32
  • I did manage to export the WMS file now. The mistake was that I did not select an expansion when exporting it. – Philip Gatzlaff Nov 25 '20 at 10:36
  • 2
    A WMS is "serving georeferenced map images over the Internet", see: en.wikipedia.org/wiki/Web_Map_Service To be able to process the raster data, you should try to find a WCS that provides the data you need, see: en.wikipedia.org/wiki/Web_Coverage_Service – Babel Nov 25 '20 at 11:20

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