====== Calc W. Of E. Probability Map (Calc Weights of Evidence Probability Map) ====== 

===== Description =====

This container calculates a probability map applying the Weights of Evidence method.

===== Inputs =====

^ Name  ^ Type  ^ Description  ^
| Landscape  | [[Categorical Map Type]]  | Map of land use and cover classes.  |
| Weights  | [[Categorical Map Type]]  | Weights of Evidence coefficients.  |
| Transitions  | [[Transition Set Type]]  | List of transitions for which spatial probability maps will be calculated. |

===== Optional Inputs =====

^ Name  ^ Type  ^ Description  ^ Default Value  ^
| Cell Type  | [[Cell Type Type]]  | Data cell type.  | Unsigned 8 Bit Integer  |
| Null Value  | [[Null Value Type]]  | Null value.  | Default  |

===== Output =====

^ Name  ^ Type  ^ Description  ^
| Probabilities  | [[Map Type]]  | Map of probabilities.  |

===== Group =====

[[Functor List#Map Algebra | Map Algebra]]

===== Notes =====

The spatial transition probability maps depict the probability of a cell at position //(x,y)// to change from state //i// to state //j//. The spatial transition probabilities are calculated for each cell on the landscape raster map and for each specified transition. Dinamica employs the Weights of Evidence method, which uses a general polytomous logistic equation (see equation) to select the most favorable areas for each type of transition. The calculations are made using spatial variables stored in the GIS.

<m>P delim{lbrace}{i doubleright j delim{|}{A inter B inter C inter D cdots inter N}{|}}{rbrace}={e^sum{}{}{W^+}}/{1+e^sum{}{}{W^+}}</m>

[{{ :weightsofevidence009.gif?nolink& | Cross-tabulation of multitemporal maps to produce transition probability maps.}}]

===== Internal Name =====

CalcWOfEProbabilityMap