Total friction of the shortest accumulated friction path over a map with friction values from a source cell to cell under consideration

Result = spreadmax(expression)

expression
spatial, non spatial nominal, ordinal, scalar, directional, ldd
Result
dimension of expression boolean

## Operation¶

Identical to spread and spreadzone but with a fourth parameter, a maximum spread distance. Areas that are not reached are given the value for MV for spreadmax and 0 for spreadmaxzone.