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The Polygonize (raster to vector) tool in QGIS Raster > Conversion menu allows for the use of a mask, however this option is not available in the Processing Modeler. What would be the best way to incorporate this functionality into the model?

For some context, I am converting a single-band raster to polygons using itself as a mask (values range from 0-1).

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You could incorporate the following tools into your model:

  1. Clip raster by mask layer tool.

  2. Then use the Polygonize (raster to vector) tool on the output of Step 1.

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