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: