Label | Explanation | Data Type |

Mosaic Dataset | Select the mosaic dataset where you want to recompute the boundary. | Mosaic Layer |

Query Definition (Optional) | An SQL query to compute a boundary for select raster datasets. Use this option in conjunction with the Append to Existing Boundary option to save time when adding new raster datasets. | SQL Expression |

Append To Existing Boundary (Optional) | Use this option when adding new raster datasets to an existing mosaic dataset. Instead of calculating the entire boundary, it will merge the boundary of the new raster datasets with the existing boundary. - Checked—Append the perimeter of footprints to the existing boundary. This can save time when adding additional raster data to the mosaic dataset, as the entire boundary will not be recalculated. If there are rasters selected, the boundary will be recalculated to include only the selected footprints. This is the default.
- Unchecked—Recompute the boundary in its entirety.
| Boolean |

Simplification Method
(Optional) | Specifies the simplification method that will be used to reduce the number of vertices, since a dense boundary can affect performance. Choose the simplification method to use to simplify the boundary. - None—No simplification method will be implemented. This is the default.
- Convex hull—The minimum bounding geometry of the mosaic dataset will be used to simplify the boundary. If there are disconnected footprints, a minimum bounding geometry for each continuous group of footprints will be used to simplify the boundary.
- Envelope—The envelope of the mosaic dataset will provide a simplified boundary. If there are disconnected footprints, an envelope for each continuous group of footprints will be used to simplify the boundary.
| String |

### Derived Output

Label | Explanation | Data Type |

Updated Input Mosaic Dataset | The updated mosaic dataset. | Mosaic Layer |