Grid Calculator Preliminary

1. Overview

There are a lot of vector computing tools in the toolbox of ArcGIS, and the grid has calculators, and it's easy to operate.

Similar to the field calculator in vectors, it is calculated by constructing map algebra expressions. The Raster Calculator tool is used to create and execute map algebra expressions to output a new raster, and the built-in functions fall into the following categories:

2. Common functions

Condition analysis

con(condition, condition is true execution expression, condition is false execution expression [optional]), such as con (("HillSha01"-"HillSha02") >200,0,1) to subtract raster HillSha01 from HILLSHA02, If its grid value is greater than 200, the assignment is 0, otherwise the assignment is 1. Similar to the IF function in Excel.

Pick Selection function

SetNull setting an empty function

Mathematical analysis

Including ABS, Power, int and other common data functions;

Trigonometric function

including Cos, Sin, tan and other common trigonometric functions;

Other functions

Diff, Inlist, IsNull, over, Test

3. Find Help

If you want to ask how to find help, here is a detailed explanation:

The first step, you need to know that the raster calculator has its presence, find its location in the search:

The second step, although I am not very familiar with the functions used, such as the con function in conditional analysis, we can use the local help of ArcGIS to find:

The third step, see the detailed help.

Fourth, you can use the function of the location theme to find the relevant content

Fifth step, carefully understand and test.

Grid Calculator Preliminary