Maps and globes, like speeches or paintings, are authored by humans and are subject to distortions. These distortions can occur through alterations to scale, symbols, projection, simplification, and choices around the map's content.

Why would a map be inaccurate?

This may be due in part to the nature of two-dimensional maps. Flattening a three-dimensional globe onto a flat surface isn't possible without some distortion. ... Mercator maps distort the shape and relative size of continents, particularly near the poles.

Why are maps not 100 accurate?

It is because there is a turning angle of 90 degrees even in the real place where "It turns 90 degrees on the left side looking" on the map is shown. On the other hand,National GeographicWe adopt the map projected by the method called "Winkel projection" because "size and shape are accurate".