Mapping

Consider the following statements about scale interpretation in maps:

I. A large-scale map shows a small area with greater detail (e.g., 1:10,000).

II. A small-scale map shows a large area with less detail (e.g., 1:10,00,000).

III. Statement scale expresses the relationship in words (e.g., "1 cm represents 1 km").

Which of the statements given above is/are correct?