Arcgis where is the raster calculator

The tool list is a convenient selection of tools that can be used in the Map Algebra expression. By clicking a tool in the list, the tool name and open and close parentheses [ ] will be placed in the expression where the pointer is currently positioned.

The remaining input required by the tool must then be entered. A tool can be placed anywhere in the expression, but it should be placed in a position that produces valid Map Algebra syntax. The expression is the Map Algebra expression to be executed. The expression must be entered with valid syntax. See the following section to learn more about the syntax rules for Map Algebra. Map Algebra is a simple and powerful algebra with which you can execute all Spatial Analyst tools, operators, and functions to perform geographic analysis.

The Map Algebra used in Raster Calculator has a syntax, or a set of rules, that must be followed to create a valid expression. If these rules are not adhered to, the expression may be invalid and will not execute, or you may get results you did not expect. Boolean And. Less Than. Boolean Or. Less Than or Equal to. Boolean XOr. Greater Than or Equal to. Boolean Not. Equal To. Not Equal. Multiple geoprocessing tools and operations can be combined in a map algebra expression using standard Python syntax.

When typing tool names, be sure to check the tool name syntax. If the capitalization is incorrect, the expression will be invalid and fail to execute because Python is case sensitive.

An example of the general format of a Map Algebra expression using using geoprocessing tools is:. Con IsNull "streams" , 0, "streams". The tool supports the standard Map Algebra syntax that is used in Python scripting. You do not need to cast input data as a Raster object when using operators.

You can easily clip a raster dataset by setting the extent environment and specifying the input raster name in the expression. When the tool is executed, the resulting raster output will be clipped based on the specified extent. To create a raster with cells of a constant value, specify the appropriate extent and cell size environment settings and enter the numerical value into the expression.

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