Patterns in Residual Mapping
Differences between observed values of the dependent variable and those predicted by a model are called residuals.
S = 0.138 _ +117.46 or y = mx + b
plug in longitudes & see how they differ from line
A GIS allows residuals to be mapped and examined for spatial patterns.
A model helps explanation and prediction after the GIS analysis.
A model should be simple, should explain what it represents, and should be tested for its limitations before use.