# An overview of the Map Algebra Operators

Spatial Analyst Map Algebra supports a series of operators. The operators can be grouped into Arithmetic, Bitwise, Boolean, and Relational categories. The available operators and their categories are listed below.

The Map Algebra operators are also available if you have an Image Analyst extension license.

The operators are overloaded since they exist in both Spatial Analyst and Python. To distinguish whether an input is a raster as opposed to a scalar variable, the input raster is cast using the Raster class: Raster("inRas").

In operators that accept two inputs, if both inputs are scalars, the Python operator will be used working on scalars. If one or both of the inputs are rasters (identified by casting with the Raster class), the Spatial Analyst operator is used and will work on each cell within the rasters. For those operators that accept a single input, if it is a scalar, then the Python operator is used; if a raster is input, the Spatial Analyst operator is used.

Map Algebra operatorDescriptionSpatial Analyst GP tool
Arithmetic

Plus

Unary Plus

N/A

Subtraction

Minus

Unary Minus

Negate

Multiplication

Times

Power

Power

Division

Divide

Integer Division

N/A

Modulo

Mod

Bitwise

Bitwise Left Shift

Bitwise Left Shift

Bitwise Right Shift

Bitwise Right Shift

Boolean

Boolean And

Boolean And

Boolean Complement

Boolean Not

Boolean Or

Boolean Or

Boolean Exclusive Or

Boolean XOr

Relational

Equal To

Equal To

Greater Than

Greater Than

Greater Than or Equal To

Greater Than Equal

Less Than

Less Than