Step 1: Understanding planimetry.
- Planimetry refers to the measurement and mapping of features in a 2D plane (x-y coordinates), without considering elevation (z-axis).
Step 2: Explanation of incorrect options.
- Anthrometry a.: Not a standard term in geospatial science.
- Geo-anthrometry b.: Incorrect term; anthropometric studies are related to human body measurements.
- Geo-planimetry d.: Not a widely used geospatial term.
Step 3: Selecting the correct option.
Since planimetry deals with mapping features in x-y coordinates, the correct answer is c. Planimetry.