The textbook explicitly states that 'a simple network of lines and polygons without a scale shall not be called a map. It is only referred to as the sketch.' This clearly establishes that Map Scale is essential for a network of lines and polygons to qualify as a map. Without a scale, the representation remains merely a sketch. Additionally, Scale is listed as one of the essential processes common to all maps under 'Essentials of Map Making', along with Map Projection, Map Generalisation, Map Design, and Map Construction and Production.