====== Null Value Type ======

A null value denotes the value that should be used to represent the "no data" value in a [[Map Type|Map]] or [[Categorical Map Type|Categorical Map]]. This value is related to the [[Cell Type Type|cell type]] used to represent the cells in the map.

===== GUI Editor =====

[{{ :editors:null_value_editor.png?nolink& |Graphical representation of the null value editor}}]

===== EGO Script =====

A null value constant can be represented in a [[EGO Script]] using the following syntax:

^ Description  ^ Representation  ^
| The default null value. This is the default null value corresponding to the current [[Cell Type Type]]  | ''.default''  |
| A specified null value  | [[Real Value Type]] constant  |

===== Automatic Conversions =====

  * **Converted from**: [[Real Value Type]], [[Integer Value Type]], [[Non Negative Integer Value Type]], [[Positive Integer Value Type]] and [[Boolean Value Type]].

  * **Converted to**: None.