# Transform a mesh object into a mesh with correlation barriers

Source:`R/deprecated.R`

`add_barrier_mesh.Rd`

Moved to the sdmTMBextra
package. Make sure to load sdmTMBextra *after* sdmTMB.

## Usage

```
add_barrier_mesh(
spde_obj = deprecated(),
barrier_sf = deprecated(),
range_fraction = 0.2,
proj_scaling = 1,
plot = FALSE
)
```

## Arguments

- spde_obj
Output from

`make_mesh()`

.- barrier_sf
An sf object with polygons defining the barriers. For example, a coastline dataset for ocean data.

**Note that this object must have the same projection as the data used to generate the x and y columns in**`spde_obj`

.- range_fraction
The fraction of the spatial range that barrier triangles have.

- proj_scaling
If

`spde_obj`

was created with scaling of the coordinates after the projection (e.g., dividing UTMs by 1000 so the spatial range is on a reasonable scale) the x and y values in`spde_obj`

are multiplied by this scaling factor before applying the projection from`barrier_sf`

.- plot
Logical.

## Value

Deprecated. See the sdmTMBextra package.