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I'm currently trying to plot a heat map of a large data set, where each position element has an additional attribute that corresponds to a count of occurrences (let's call it ni).

I want these counts to be taken into account in the density estimate. I guess an easy approach would be to duplicate each of the elements ni times. However, as the data set is pretty large already, I would like to avoid duplication.

Is that possible in QGIS without much data pre-processing?

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According to the documentation, there is a Use weight from field option that you can specify your occurence field. Quoting the documentation:

This can be used to increase the influence certain features have on the resultant heatmap.

  • @twiechert You're welcome! Please mark this answer as accepted if it solves your issue. Thanks! – ArMoraer Aug 17 '17 at 11:28

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