I got a small shapefile here: https://login.filesanywhere.com/fs/v.aspx?v=8c6d62875b6371b5a3ac . I need to make it a little bigger by adding a border above along the coast and another border in the ocean below along the coast. Ideally, I would like to do it using R but ArcMap or ArcMap pro are ok as well. I can also do it myself if someone is willing to share the steps in R or Arcmap. I have not attempted anything because I have no idea where to start. See snapshot below:
library(mapview)
library(tmap)
library(maps)
library(tidyverse)
myshape <- readRDS('bay.RDS')
