I have a point dataset with XYZ values.

I inserted this layer in QGIS 3.6 via layer > add layer > add delimited layer.

Then, I interpolated these points to a raster via interpolation > TIN interpolation.

However, now the data are interpolated over the whole domain, even in areas where no data are present in the original file. How can I clip out the interpolated raster with the original shape of the point dataset?

The xyz file can be downloaded from:


Interpolated raster:


Interpolated raster with original point dataset on top:


  • Points to Polygon then apply Inverted polygons to it further put over the raster – Taras Oct 22 '19 at 11:37
  • @Taras. Hi thanks. Where is the points to polygon tool? Does it need to be downloaded somewhere? – user152287 Oct 22 '19 at 11:47
  • I think there are several possibilities to accomplish this, by means of a plugin Point to Polygon, as well check this article Converting point sets to polygon boundaries?. – Taras Oct 22 '19 at 17:21
  • By the way which projection is that? Is it EPSG:4176? – Taras Oct 22 '19 at 18:31
  • I think it also possible with a different approach: what if you find a shapefile of Antarctica in exactly the same shape and just overlap it afterwards? – Taras Oct 22 '19 at 18:56

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