The length of a feature can be calculated for a feature using what FME feature function?

• A. NumCoords
• B. Dimension
• C. GeometryPartCount
• D. Length

Answer: (D)

The Length function is used to obtain the geometric length of a feature. It returns a numeric value representing the distance along the feature’s geometry, using the feature’s coordinate units. For linear features, this gives the actual line length; for polygon features, it yields the perimeter of the boundary. The other functions don’t measure length: NumCoords counts the total coordinates in the geometry, Dimension returns the geometry’s dimension (point, line, or polygon), and GeometryPartCount returns how many parts the geometry has. In practice, you’d use Length in a Calculator or AttributeManager to store the feature’s length, and project to a suitable CRS if you need length in meaningful units like meters or feet.