How did you get A 2d image

[Zedonboy]

How did you convert Time/Frequency Domain reflected radio wave to that color map image.

[stonespheres]

Hi Zedonboy, I'm not the owner of this repository, nor am I a contributor, but I think I can answer your question as I'm currently developing one of these myself.
There are many ways of doing this, some more complicated than others. What I would do is assign a base colour for your image, then create a scale of colours according to increases or decreases in the frequency domain. You could base these off spectra values and see what you come up with!
For each change frequency, you'll probably want to assign a colour value to a range and print that to the map.