@format A list containing the R-INLA survey mesh, the set of triangles in the barrier and the barrier polygons for plotting
survey_meshAn object of class list of length 3.
An example of a mesh containing barrier information for use with sim_ays_covar_spde. Also derived from global administrative boundaries data (http://gadm.org). Details on creation provided in the data-raw folder of this package in the survey_mesh.R file. Includes the set of barrier triangles needed to use the barrier approach, barrier polygons for plotting and the set of triangles in the barrier.