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Is it possible to make something like this using python ?

How should i best structure my data in order to make this map and what should i use to draw it. Code is not necessarily required. I just need some advice at this point.

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Your example is not a heatmap. Rather, it is a raster, probably an example of interpolation. A model has been used to give each cell in a regular grid a numerical value. These values range from high to low, and a colour scheme has been chosen to reflect this. (I can see how you can mistake this for a "heat" map.)

If you want to make something like this, putting aside all issues of modelling rigour for your particular application, you should look into spatial interpolation. That is the process of taking a series of discrete observations, like earthquake measuring stations, and interpolating a continuous surface from it. That is, you want to estimate the value of a station, where you don't actually have a station. There are various methods of interpolation you could consider.

You could consider using QGIS to both make and draw such a map.

I can't comment on how you should structure your data without knowing what data it is that you have.

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