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I have a point layer for the cold air flow in specific region. I would like to simplify all the single points to a polygon shape as to be able to join the data with other spatial data. My way is pretty complicated (buffer the points e.g.400m, dissolve, simplify) because I have to extract the single values (orange, blue, light blue) and then do it with all these single values separately. Afterwards there is the need to create differences in order to avoid doubles. I wonder if somebody knows a more convenient way.