'Density map of points data with a background image

I need to create a density map of points data (x, y) which are UTM coordinates (written in a .csv file). Then, I would like to have as a background map a selected domain extrapolated by Google Earth. What can I do? I tried with the following code to create the density/heatmap but the result is not working. Anybody is able to help me?

The format of the .csv file is the following:

x;y
278803.1348;4064544.081
278799.8642;4064444.58
278799.8642;4064444.586 
....

The UTM domain that I need to extrapolate has:

xmin=278000
xmax=280500
ymin=4063070
ymax=4065570

Thanks in advance, Silvia



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