| | Name | Type | Identifier | Description | Constraints |
|---|
| Input | Elevation | Grid (input) | ELEVATION | - | - |
| Output | Visibility | Grid (output) | VISIBILITY | - | - |
| Options | Height | Floating point | HEIGHT | Height of the light source above ground. | Default: 100.000000 |
| Unit | Choice | METHOD | - | Available Choices:
[0] Visibility
[1] Shade
[2] Distance
[3] Size
Default: 1 |
| Multiple Observer | Boolean | MULTIPLE_OBS | Allow multiple observer positions. | Default: 0 |