This picture is a simplified graphical depiction of the Curry Grid and the Hartmann Grid.
Discovered by the physician Ernst Hartmann in 1954 and described in detail in his book Krankheit als Standortproblem (Illness as a Location Problem), the Hartmann grid is associated with the Earth’s magnetic field. Its lines measure between 8 and 12 inches in width approximately. These lines are spaced about 6 feet apart in the north-south direction and about 10 feet apart in the east-west direction. However, these values can vary immensely depending on geographical location The Hartmann grid is often referred to as a global grid. In his book, Hartmann provides clear evidence for the pathogenic character of the grid. See also: Schumacher, 2005, 93-97; Dale, 2009, 108-109.