Visibility or viewshed analysis.
| | Name | Type | Identifier | Description | Constraints |
| Input | Elevation | Grid, input | ELEVATION | - | - |
| Output | Visibility | Grid, output | VISIBILITY | - | - |
| Options | Grid System | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Unit | Choice | METHOD | - | Available Choices: [0] Visibility [1] Shade [2] Distance [3] Size Default: 1 |
| Ignore No-Data | Boolean | NODATA | Ignore elevations that have been marked as no-data. | Default: 0 |
| Height | Floating point | HEIGHT | Height of the light source or observer above ground. | Minimum: 0.000000 Default: 10.000000 |
| Add Multiple Locations | Boolean | MULTIPLE | Add multiple light source or observer positions. | Default: 0 |