GAT contains several tools to allow for the mathematical manipulation of individual grid cells in a raster grid. These tools include:

- Absolute Value
- Addition
- Ceil
- Division
- Exponential (base e)
- Floor
- Integer Divide
- Natural logarithm (ln)
- Log base 10
- Max
- Min
- Modulo
- Multiply
- Negate
- Power
- Reciprocal
- Round Values
- Square Root
- Square
- Subtraction
- Truncate values

The logical operators include:

The comparison operators include:

- Greater Than
- Greater Than Equal To
- Less Than
- Less Than Equal To
- Equal To
- Not Equal To
- Is NoData Value

Notice that comparison operators result in Boolean images. All mathematical analysis tools can also be accessed through either the ** Raster Calculator** or a Python script, by calling the

- None

- John Lindsay (2012) email: jlindsay@uoguelph.ca