====== Calc Areas ====== 

===== Description =====

This functor calculates the area of each source feature.

===== Inputs =====

^ Name  ^ Type  ^ Description  ^
| Categorical Map  | [[Categorical Map Type|Categorical Map]]  | Map containing classes or categories.  |

===== Output =====

^ Name  ^ Type  ^ Description  ^
| Areas  | [[Table Type|Table]]  | Area of each map category in cells, hectares and square meters.  |

===== Group =====

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

===== Notes =====

Only the areas corresponding to class or categories defined in the input map header are calculated.

If the cell dimensions are represented using degrees, the areas in hectares and square meters becomes an approximation. All cells are always supposed to be of the same size.

The table containing the resulting area has the following format.

^ Column Name  ^ Key or Data?  ^ Column Type  ^ Description  ^
| "Category"  | Key  | Real  | Category in the feature map  |
| "Area_In_Cells"  | Data  | Real  | Area of corresponding category in cells  |
| "Area_In_Hectares"  | Data  | Real  | Area of corresponding category in hectares  |
| "Area_In_Square_Meters"  | Data  | Real  | Area of corresponding category in square meters  |
===== Internal Name =====

CalcAreas