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I have a raster of non-continuous surface with valid values and nodata values, and I'm trying to interpolate it into a continuous surface image without nodata values using QGIS. Anyone could help?

The non-continuous surface (white area has nodata value and coloured area has valid values: enter image description here

What I want to achieve using QGIS: enter image description here

Thank you!

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Raster pixels to points to convert the raster to point vector. Then you can interpolate using IDW interpolation or any other method (the SAGA toolbox has several algorithms).

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