Value maps/Value columns
Value maps and value columns contain values in contrast to maps and columns that contain for instance class names or identifiers.
When it is stated that an operation requires or will produce a value map:
While performing calculations or operations:
If allowed by the (selected) domain of the output object, you may vary the value range and the precision for the output map or column yourself, during each individual operation.
Value maps may use one of the system domains listed below, however, you can also create your own value domains when certain maps or columns contain values with a special meaning, for instance pH, height, yields, or concentration values. When you create a user-defined value domain, it is advised to use a value range and a precision that fit your data. Subsequently, you can also create a meaningful representation (type value) for the values in such a domain.
System domains for values, including the undefined value:
System domains for images:
Furthermore, most operations that can be performed on a map with a value domain can also be performed on maps with one of the following domains:
See also: