A two-dimensional table is used to combine or reclassify two raster maps with a class or ID domain. It defines a value for each possible combination of input classes or IDs. A two-dimensional table view consists of rows which represent one domain and of columns which represent another domain. In the two-dimensional table, you have to assign a value, class name or ID to the fields which represent the combination of these domains.
To create a two-dimensional table:
The Create Two-Dimensional Table dialog box appears.
When you create a new two-dimensional table, it is directly displayed in a table window where you can also edit it. To open and to edit an existing two-dimensional table, see also: How to edit a two-dimensional table.
To apply a two-dimensional table:
The table can be applied by typing a special expression on the command line of the Main window:
OUTMAP = 2dimtablename[map1,map2]
When you apply the two-dimensional table, you need two input raster maps which have the domains as used by the two-dimensional table, the output raster map then contains the values, classes or IDs that you entered in the fields of the two-dimensional table.
See also:
ILWIS objects : two-dimensional tables
How to edit a two-dimensional table
Map calculation: classifying two maps according to a two-dimensional tables