In the context of a GIS, what is a spline?

Group of answer choices

It is a narrow gap formed when the shared boundary of two polygons do not meet exactly.

It is a trait exhibited by data that is topologically correct.

It is the smallest distance between two adjacent features.

It is an interpolation method that fits a multivariate statistical regression model to the known points, assigning a value to each unknown location based on that model.

It is an interpolation method that forces a smoothed curve through the set of known input points to estimate the unknown, intervening values.