Methods and control systems for calculating a size of a predefined area

A control system (800) for calculating a size of a predefined area (100), wherein a geographic layout of the predefined area (100) is stored in the control system (800), the control system (800 comprises a processing circuitry (803) and a memory (804), the memory (804) containing instructions executable by the processing circuitry (803), the control system (800) is operative for:

• defining parallel lines (102, 104, 106, 108, 110, 112, 114, 116) across the entire predefined area (100), wherein the length of each parallel line is equal to or greater than the width of the predefined area (100) in the direction of each parallel line and the distance (118, 120) between each parallel line is equal;
• processing the parallel lines (102, 104, 106, 108, 110, 112, 114, 116) so that parts of the parallel lines which are outside the predefined area (100) are deleted;
• calculating a total length of all the processed parallel lines (202, 204, 206, 208, 210, 212, 214, 216, 218);
• calculating the size of the predefined area (100) based on the total length of the processed parallel lines (202, 204, 206, 208, 210, 212, 214, 216, 218) and the distance (118, 120) between each parallel line.