| Description: Specifies the pixel value in the mask that will represent transparent (or NoData/null) for the characterized image. This is normally defined as 0 in the mask layer. Once defined, any other value in the mask represents opaque or translucent (in other words, valid) in the characterized image. |
| Namespace Id: img | Steward: img | Class Name: Image_Mask_File | Type: ASCII_Real |
| Minimum Value: -1.7976931348623157e308 | Maximum Value: 1.7976931348623157e308 | Minimum Characters: None | Maximum Characters: None |
| Unit of Measure Type: None | Default Unit Id: None | Attribute Concept: None | Conceptual Domain: REAL |
| Status: Active | Nillable: false | Pattern: None |
| Permissible Value(s) | No Values | |