The map Dot showed was produced by Neuroguide, a 19 channel normative database QEEG acquisition and plotting program. It’s used frequently by neurofeedback practitioners using Brainmaster Discovery equipment, and others. Two datasets are usually recorded with QEEG, several minutes of eyes-closed sitting quietly. Then several minutes of eye-opened looking at a fixed location on the wall; again quietly. This map is likely showing the eyes-closed.
The map is Z-scored, showing the number of standard deviations her map differs from the database norm for her age and gender.
Some forms of Z-score neurofeedback then apply visual or audio feedback during a session to increase or decrease sites to more align with the norms. Since her maps are mostly green, she is close to the norm already across most sites and bands.
You might find these articles by Jay Gunkelman on QEEG phenotypes to be helpful background.