Calculations

You can calculate with raster maps by typing a Map Calculation formula on the command line of the Main window or in the Map Calculation dialog box. You can calculate with columns by typing a Table Calculation formula on the command line of a table window.

When the definition symbol = is used in a calculation, the output map or column is dependent. For dependent maps and columns, the formula by which they are created is stored by these output maps and columns as their definition. You can easily update dependent objects in case input data have changed. You can also change the formula itself.

A simple MapCalc formula reads: Map3 = Map1 + Map2

When the assignment symbol := is used in a calculation, dependency links are immediately broken.