In surveying and mapping, what term denotes vertical distances measured above a common datum, reference plane, or benchmark point? Choose the correct word used for the height value itself.

Introduction / Context:Projects in civil, architectural, and landscape design reference heights to a common datum so all participants use consistent vertical control. The term used for a point’s vertical distance above such a datum is fundamental vocabulary in plans and specifications.

Given Data / Assumptions:

• A vertical distance is being measured.
• The reference is a common datum, such as mean sea level or a project benchmark.
• We must name the quantity itself, not the drawing type.

Concept / Approach:

An elevation is the vertical distance of a point above (or below) a specified reference plane or benchmark. Elevations allow designers to coordinate floor levels, road grades, drainage, and structural heights. They appear on topographic maps, profiles, sections, and plan callouts.

Step-by-Step Solution:

Verification / Alternative check:

Survey field books list elevations for control points, which are then used to generate contour maps and longitudinal profiles of roads, pipelines, or channels.

Why Other Options Are Wrong:

Plats: legal parcel maps, not height values.

Traverse: a method of sequential surveying measurements, not a vertical value.

Profiles: drawings showing elevation variation along a line, but not the scalar value name itself.

Common Pitfalls:

Confusing an “elevation view” (an orthographic exterior view in architecture) with the numerical elevation value. Context clarifies meaning.

Final Answer:

Elevations