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I have parameter data that is linked to points within a polygon area. I am trying to find ways of creating an interpolated layer for the extent of the polygon within which the points are located as either a TIN or DTM layer, based on these geolocated points and their values.

I have read about an Interpolation plugin in QGIS that would have tools within it that might be a start. However that plugin no longer seems to be available.

Ideally I would like to be able to achieve this in PostGIS or by adapting some code that might be available for doing something similar. From experience could anyone offer some advice on the best approach to take and what tools they might be aware of that so far I may not have come across in my searching

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