[PeterisP]

Civilian maps were intentionally distorted. In various places the details were completely wrong - for example, smaller roads near some Baltic coast beaches (e.g. "potential conflict/landing sites") were simply drawn with no relation to reality to fill in the space with something superficially resembling the density of roads but with different angles/locations/everything; the locals knew to not rely on this and for construction/planning purposes you used different maps than the civilians.