How do you assess the accuracy and precision of remote sensing-derived leaf area index measurements?

Sample interview questions: How do you assess the accuracy and precision of remote sensing-derived leaf area index measurements?

Sample answer:

Accuracy assessment:

  • Ground-based measurements: Compare with in situ measurements of leaf area index (LAI) taken at the same time and location as the remote sensing data acquisition.
  • Reference datasets: Utilize existing high-quality reference LAI datasets, such as those derived from airborne laser scanning (ALS) or destructive sampling.
  • Cross-validation: Partition the data into training and testing subsets, train models on the training set, and evaluate their performance on the testing set to quantify accuracy.
  • Cross-comparison: Compare with LAI measurements derived from other remote sensing data sources, such as high-resolution imagery or spectroscopy.

Precision assessment:

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