Which of the following is NOT a type of map scale?

In cartography, map scales are essential because they indicate the relationship between distances on the map and corresponding distances in the real world. Each type of scale serves a distinct purpose in conveying this information.

Representative scale refers to a ratio or fraction where a unit of measurement on the map represents a specific number of the same units in reality, such as 1:50,000. This type of scale is useful for making precise measurements.

Visual scale, also called a graphic scale, consists of a bar or line that visually represents distances on the map. This allows users to intuitively understand distances without needing to perform calculations.

Verbal scale uses words to describe the relationship between map measurements and real-world distances. For example, stating that "1 inch equals 5 miles" provides a clear understanding of scale without needing to interpret numbers or fractions.

Implied scale, on the other hand, is not a recognized standard type of map scale in cartographic conventions. Unlike the other three types, implied scale does not provide a formal way to measure or understand distances on a map. Therefore, it is the correct answer to the question of which is NOT a type of map scale.