elev: Generalised elevation value.
slope: Maximum gradient at a point.
aspect: Direction of maximum gradient.
profc: Profile convexity (vertical in direction of steepest slope).
planc: Plan convexity (contour curvature).
crosc: Cross sectional convexity (tangent to contours, downslope).
longc: Longitudinal convexity (perpendicular to contours downslope).
minic: Minimum convexity.
maxic: Maximum convexity.
feature: Morphometric features:
peaks, ridges, passes, channels, pits and planes.
resid:
moran: Moran statistics
geary:
Last changed: $Date: 2002/01/25 05:45:33 $