YSBAT     Geometric Rectification      04-03-07

- Explain the situation in which you would use resampling, and the situation in which you would use projections to achieve the desired spatial rectification.

- Summarize the resampling process in four steps

- Explain the two issues that must be kept in mind while collecting ground control points (distribution and confidence) and explain why they are important.

- Define "mapping function" and describe the difference between linear and higher-order functions

- Define "resampling type" and describe the difference between bilinear and nearest neighbor

- Explain how to calculate the number of rows and columns to be included in the output image while resampling.

- Define "reference system parameter file," and define its major components: projection, datum, Delta WGS84, ellipsoid, origin lat/long, and origin x/y.

- Define RMS

- Explain what "residual RMS errors" mean, and how you would use this information during the resampling process