# install dev version of ggplot2
devtools::dev_mode()
devtools::install_github("tidyverse/ggplot2")

library(tidyverse)
library(sf)
library(rmapshaper)
library(ggthemes)


# load data
source(file = url("https://gist.githubusercontent.com/ikashnitsky/4b92f6b9f4bcbd8b2190fb0796fd1ec0/raw/1e281b7bb8ec74c9c9989fe50a87b6021ddbad03/minimal-data.R"))

# test how good they fit together
ggplot() +
        geom_sf(data = REG, color = "black", size = .2, fill = NA) +
        geom_sf(data = NEI, color = "red", size = .2, fill = NA)+
        coord_sf(datum = NA)+
        theme_map()

ggsave("test-1.pdf", width = 12, height = 10)

# simplify
REGs <- REG %>% ms_simplify(keep = .5, keep_shapes = TRUE)
NEIs <- NEI %>% ms_simplify(keep = .5, keep_shapes = TRUE)


ggplot() +
        geom_sf(data = REGs, color = "black", size = .2, fill = NA) +
        geom_sf(data = NEIs, color = "red", size = .2, fill = NA)+
        coord_sf(datum = NA)+
        theme_map()

ggsave("test-2.pdf", width = 12, height = 10)