Give one reason for each of the following:
(i) Ranging pole has a pointed metal end.
(ii) Note book is important during field study.
(iii) Back bearings are taken during compass survey.
(iv) During surveying, measurements are called back by the booker
ANSWER
(i) Ranging pole has a pointed metal end: The pointed metal end of a ranging pole is used to precisely mark a specific point on the ground. This helps in accurately establishing control points or reference points during surveying. The pointed end allows for precise placement and ensures that the pole is firmly planted in the ground, reducing errors in measurements.
(ii) Note book is important during field study: A notebook is essential during field study as it serves as a record-keeping tool. Researchers and surveyors can document their observations, measurements, sketches, and other relevant information in the notebook. It helps in maintaining a systematic record of data and ensures that important details are not forgotten or lost. The notebook also serves as a reference for future analysis, interpretation, and reporting of the field study findings.
(iii) Back bearings are taken during compass survey: Back bearings are taken during compass survey to verify the accuracy of the initial bearings and to check for any errors or discrepancies in measurements. By taking back bearings, the surveyor can compare the observed bearings with the calculated or expected bearings. If there is a significant difference between the two, it indicates the presence of angular errors or magnetic disturbances that may affect the accuracy of the survey.
(iv) During surveying, measurements are called back by the booker: Calling back measurements by the booker is an important practice in surveying to ensure accuracy and prevent errors. It involves the surveyor or booker repeating the recorded measurements aloud, allowing for cross-checking and verification. This process helps in identifying any mistakes, transposition errors, or misreadings that may have occurred during the initial measurement. It acts as a quality control measure and enhances the reliability and validity of the survey data.
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