I would like to be able to export a section of a WMS to a georeferenced image using the graphical modeller.
I already have the extent setup for other things but I can't find an algorithm that will work. I have tried "r.out.png" and "clip raster by extent" with no joy.

  • A WMS service returns a picture of the data you can not reliably extract meaningful information from it - if you require actual data you must use a WFS or WCS endpoint to fetch actual data. – Ian Turton Mar 10 at 8:37
  • A WMS can provide pictures of lots of different types of data. In this case its an aerial image and there are plenty of ways to get a clipped extent at a certain resolution but I can't find one that works inside the modeller. – Sethinacan Mar 10 at 8:50
  • that's because it is still a picture not a data source, use a WCS which is designed for this – Ian Turton Mar 10 at 8:54
  • No WCS available – Sethinacan Mar 10 at 9:03

You can export a rendering of the WMS using the Convert map to raster algorithm which allows the specification of resolution, extent and layers to include.

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