# topography_geodesy Section

This section configures **topography and geodesy settings**, including **bathymetry**, **slopes**, and **depth offsets**.

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 | **Parameter** | **Description** |
 |---------------|----------------|
 | `OnOffFlag` | Flag to enable/disable topography (`TRUE`, `FALSE`). |
 | `bottom_motion_flag` | Flag to enable/disable bottom motion (`TRUE`, `FALSE`). |
 | `bottom_motion_directory` | Directory for bottom motion files. |
 | `bottom_motion_file_convention` | File convention for bottom motion. |
 | `topo_file` | Bathymetry file. |
 | `slope_file` | Bathymetry gradient file. |
 | `zmin_file` | Minimum elevation file. |
 | `relative_minimum_depth` | Minimum depth relative to minimum elevation (default: `5.0 m`). |
 | `minimum_depth` | Overall minimum depth in model bathymetry (default: `10.0 m`). |
 | `minimum_depth_polygons` | File for minimum depth polygons. |
 | `minimum_depth_values` | File for minimum depth values. |
 | `drying_minimum_depth` | Numerical minimum depth at dry nodes (default: `0.10 m`). |
 | `drying_threshold` | Depth threshold to select dry nodes (default: `0.0 m`). |
 | `drying_minimum_layer_depth` | Numerical minimum layer depth at dry nodes (default: `AUTO`). |
 | `depth_offset` | Overall depth offset (default: `0.0 m`). |
 | `depth_offset_polygons` | File for depth offset polygons. |
 | `depth_offset_values` | File for depth offset values. |
 | `depth_scale_factor` | Depth scale factor (default: `1.0`, dimensionless). |
 | `depth_scale_polygons` | File for depth scale polygons. |
 | `depth_scale_values` | File for depth scale values. |
 | `distance_to_coast` | File for distance to coast. |
 | `mean_level_file` | File for mean dynamic topography. |
 | `mean_level_offset` | Flag to apply mean dynamic topography offset to depths (`TRUE`, `FALSE`). |