Discussion
Which of the given options best describes the truthfulness of the following statements? i) Interpolation is a statistical method by which related known values are used to estimate an unknown value or set of values. ii) In the Inverse Distance Weighted (IDW) interpolation method, estimation of cell values is done by averaging values of sample data points in the neighbourhood of each processing cell.
Answer: A
Both statements are true. Interpolation is a statistical method by which related known values are used to estimate an unknown value or set of values. In the Inverse Distance Weighted method the cell values are estimated by averaging the values of sample data points in the neighbourhood of each processing cell, with nearer points given more weight. So the first option is correct. In IDW a point close to the cell has more influence on its value than a point far away.
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