True or false: No map has true scale everywhere.

The assertion that no map has true scale everywhere is indeed accurate. This statement reflects a fundamental concept in cartography known as scale distortion, which occurs because maps represent the three-dimensional surface of the Earth on two-dimensional surfaces.

Since the Earth is a sphere (or more accurately, an oblate spheroid), any attempt to flatten its surface will lead to distortions in scale, distance, and area. For example, on a typical map projection like the Mercator projection, scale is accurate along certain lines (such as the equator) but diverges significantly as you move towards the poles. This means that while one point on the map may accurately represent distances, another point can represent those distances inaccurately.

Furthermore, even small-scale maps, which cover larger areas, still face similar challenges in terms of distortion. It is important for GIS professionals to understand these limitations when creating and interpreting maps, as they have significant implications on analysis and decision-making processes.

Therefore, the statement is true because it encapsulates the inherent limitation present in all map projections.