Available with Image Analyst license.

The ArcGIS Image Analyst extension provides a rich suite of raster functions in ArcGIS Pro.

## Raster functions

A large number of raster functions is provided with the Image Analyst extension. These functions are grouped into categories of related functionality in the following tables. Each function is linked within the table to a detailed description.

### Classification functions

The following functions are found in the Classification raster function category. Use the segmentation and classification functions to prepare segmented rasters or pixel-based raster datasets to use in creating classified raster datasets.

Function | Description |
---|---|

Classify function | Applies the appropriate classifier and associated training data specified in the .ecd training file to a raster dataset or segmented raster. |

Maximum Likelihood Classify function | Performs a maximum likelihood classification on a raster dataset or mosaic dataset. |

Segment Mean Shift function | Groups pixels that are adjacent and have similar spectral characteristics into segments. This can be used as a second raster in the Classify function. |

### Math functions

The following functions are found in the Math raster function category. The general math functions apply a mathematical function to the input raster(s). These tools fall into several categories. The arithmetic tools perform basic mathematical operations, such as addition and multiplication. There are tools that perform various types of exponentiation operations, which include exponentials and logarithms, in addition to the basic power operations. The remaining tools are used either for sign conversion or for conversion between integer and floating point data types.

Function | Description |
---|---|

Abs function | Calculates the absolute value of the pixels in a raster. |

Arithmetic function | Uses the pixel values to calculate mathematical operations on overlapping rasters. |

Band Arithmetic function | Calculates indexes using the predefined formulas or user-defined expressions. |

Calculator function | Computes a raster from a mathematical expression based on the raster bands. |

Divide function | Divides the values of two rasters on a pixel-by-pixel basis. |

Exp function | Calculates the base e exponential of the pixels in a raster. |

Exp10 function | Calculates the base 10 exponential of the pixels in a raster. |

Exp2 function | Calculates the base 2 exponential of the pixels in a raster. |

Float function | Converts each pixel value of a raster into a floating-point representation. |

Int function | Converts each pixel value of a raster to an integer by truncation. |

Ln function | Calculates the natural logarithm (base e) of each pixel in a raster. |

Log10 function | Calculates the base 10 logarithm of each pixel in a raster. |

Log2 function | Calculates the base 2 logarithm of each pixel in a raster. |

Minus | Subtracts the value of the second input raster from the value of the first input raster on a pixel-by-pixel basis. |

Mod function | Finds the remainder (modulo) of the first raster when divided by the second raster on a pixel-by-pixel basis. |

Negate function | Changes the sign (multiplies by -1) of the pixel values of the input raster on a pixel-by-pixel basis. |

Plus function | Adds (sums) the values of two rasters on a pixel-by-pixel basis. |

Power function | Raises the pixel values in a raster to the power of the values found in another raster. |

Round Down function | Returns the next lower integer, as a floating-point value, for each pixel in a raster. |

Round Up function | Returns the next higher integer, as a floating-point value, for each pixel in a raster. |

Square function | Calculates the square of the pixel values in a raster. |

Square Root function | Calculates the square root of the pixel values in a raster. |

Times function | Multiplies the values of two rasters on a pixel-by-pixel basis. |

Weighted Sum function | The Weighted Sum function allows you to overlay several rasters, multiplying each by their given weight and summing them together. |

### Math: Conditional

The following functions are found in the Math: Conditional raster function category. The conditional functions allow you to control the output values based on the conditions placed on the input values. The conditions that can be applied are of two types: queries on the attributes or a condition based on the position of the conditional statement in a list.

Function | Description |
---|---|

Con function | Performs a conditional if/else evaluation on each of the input cells of an input raster. |

Set Null function | Sets identified pixel locations to NoData based on the specified criteria. Returns NoData if a conditional evaluation is true, and returns the value specified by another raster if it is false. |

### Math: Logical

The following functions are found in the Math: Logical raster function category. The logical math functions evaluate the values of the inputs and determine the output values based on Boolean logic. These functions process raster datasets in five main areas: Bitwise, Boolean, Combinatorial, Logical, and Relational.

Function | Description |
---|---|

Bitwise And function | Performs a Bitwise And operation on the binary values of two input rasters. |

Bitwise Left Shift function | Performs a Bitwise Left Shift operation on the binary values of two input rasters. |

Bitwise Not function | Performs a Bitwise Not (complement) operation on the binary value of an input raster. |

Bitwise Or function | Performs a Bitwise Or operation on the binary values of two input rasters. |

Bitwise Right Shift function | Performs a Bitwise Right Shift operation on the binary values of two input rasters. |

Bitwise Xor function | Performs a Bitwise eXclusive Or operation on the binary values of two input rasters. |

Boolean And function | Performs a Boolean And operation on the pixel values of two input rasters. If both input values are true (nonzero), the output value is 1. If one or both input values are false (zero), the output value is 0. |

Boolean Not function | Performs a Boolean Not (complement) operation on the pixel values of the input raster. If the input values are true (nonzero), the output value is 0. If the input values are false (zero), the output value is 1. |

Boolean Or function | Performs a Boolean Or operation on the cell values of two input rasters. If one or both input values are true (nonzero), the output value is 1. If both input values are false (zero), the output value is 0. |

Boolean Xor function | Performs a Boolean eXclusive Or operation on the cell values of two input rasters. If one input value is true (nonzero) and the other value is false (zero), the output value is 1. If both input values are true or both are false, the output value is 0. |

Equal To function | Performs an equal-to operation on two rasters on a pixel-by-pixel basis. |

Greater Than function | Performs a Relational greater-than operation on two inputs on a pixel-by-pixel basis. Returns a value of 1 for pixels where the first raster is greater than the second raster and a value of 0 for pixels where the first raster is not greater than the second raster. |

Greater Than Equal function | Performs a Relational greater-than-or-equal-to operation on two inputs on a pixel-by-pixel basis. Returns a value of 1 for pixels where the first raster is greater than or equal to the second raster and a value of 0 for pixels where the first raster is not greater than or equal to the second raster. |

Is Null function | Determines which values from the input raster are NoData on a pixel-by-pixel basis. Returns a value of 1 if the input value is NoData and a value of 0 for pixels that are not NoData. |

Less Than function | Performs a Relational less-than operation on two inputs on a pixel-by-pixel basis. Returns a value of 1 for pixels where the first raster is not less than the second raster. |

Less Than Equal function | Performs a Relational less-than-or-equal-to operation on two inputs on a pixel-by-pixel basis. Returns a value of 1 for pixels where the first raster is less than or equal to the second raster and a value of 0 where it is not less than or equal to the second raster. |

Not Equal function | Performs a Relational not-equal-to operation on two inputs on a pixel-by-pixel basis. Returns a value of 1 for pixels where the first raster is not equal to the second raster and a value of 0 for pixels where it is equal to the second raster. |

### Math: Trigonometric

The following functions are found in the Math: Trigonometric raster function category. The trigonometric math functions perform various trigonometric calculations on the values in an input raster.

Function | Description |
---|---|

ACos function | Calculates the inverse cosine of the pixels in a raster. |

ACosH function | Calculates the inverse hyperbolic cosine of the pixels in a raster. |

ASin function | Calculates the inverse sine of the pixels in a raster. |

ASinH function | Calculates the inverse hyperbolic sine of the pixels in a raster. |

ATan function | Calculates the inverse tangent of the pixels in a raster. |

ATan2 function | Calculates the inverse tangent (based on x,y) of the pixels in a raster. |

ATanH function | Calculates the inverse hyperbolic tangent of the pixels in a raster. |

Cos function | Calculates the cosine of the pixels in a raster. |

CosH function | Calculates the hyperbolic cosine of the pixels in a raster. |

Sin function | Calculates the sine of the pixels in a raster. |

SinH function | Calculates the hyperbolic sine of the pixels in a raster. |

Tan function | Calculates the tangent of the pixels in a raster. |

TanH function | Calculates the hyperbolic tangent of the pixels in a raster. |

### Statistical

The following functions are found in the Statistical raster function category. Use the statistical functions to perform statistical raster operations on a local, neighborhood, or zonal basis.

Function | Description |
---|---|

Cell Statistics function | Calculates statistics from multiple rasters on a pixel-by-pixel basis. The available statistics are Majority, Maximum, Mean, Median, Minimum, Minority, Range, Standard Deviation, Sum, and Variety. |

Zonal Statistic function | Calculates statistics on values of a raster within the zones of another dataset. |