Measured data shall be written on field sheets.

• A. Data Registers
• B. Observation Logs
• C. Survey Reports
• D. Field Sheets

Answer: (D)

Measuring data in the field is recorded in a format designed to capture numerical readings, locations, instrument settings, and time stamps as the work happens. Field sheets provide a structured template to note coordinates, distances, angles, instrument readings, and conditions all in one place. This contemporaneous recording ensures accuracy and traceability, making it easier to verify calculations and transfer data into maps or processing steps.

Data registers are general logs for administrative or miscellaneous data and lack the specialized fields for technical measurements. Observation logs focus on qualitative notes rather than precise measurements and instrument readings. Survey reports are comprehensive documents assembled after fieldwork to present results, methods, and conclusions, not the immediate recording of measured data in the field. Field sheets, by contrast, are specifically designed for capturing measured data during field activities in a standardized way.