Concept:A map is a scaled representation of the earth's surface or a part of it, while the other options are either rough or unrelated.
Explanation:A map is drawn to scale, showing accurate distances and positions of places.
A layout is an arrangement or plan of a structure or area, not necessarily the earth's surface.
A sketch is a rough drawing usually not drawn to scale.
A landmark is a recognizable feature of the landscape, not a representation drawn to scale.
Thus, map is the correct choice.
Answer:C. Map