| | Name | Type | Identifier | Description | Constraints |
| Input | Grid | Grid (input) | GRID | - | - |
| Mask (*) | Grid (optional input) | MASK | - | - |
| Output | Closed Gaps Grid (*) | Grid (optional output) | CLOSED | - | - |
| Options | Grid system | Grid system | PARAMETERS_GRID_SYSTEM | - | - |
| Only Process Gaps with Less Cells | Integer | MAXGAPCELLS | is ignored if set to zero | Minimum: 0 Default: 0 |
| Maximum Points | Integer | MAXPOINTS | - | Minimum: 0 Default: 1000 |
| Number of Points for Local Interpolation | Integer | LOCALPOINTS | - | Minimum: 0 Default: 20 |
| Extended Neighourhood | Boolean | EXTENDED | - | Default: 0 |
| Neighbourhood | Choice | NEIGHBOURS | - | Available Choices: [0] Neumann [1] Moore Default: 0 |
| Radius (Cells) | Integer | RADIUS | - | Minimum: 0 Default: 0 |
| Relaxation | Floating point | RELAXATION | - | Minimum: 0.000000 Default: 0.000000 |
| (*) optional |