In Metropolitan-Council/regionalparks.acs: Regional Parks and the American Community Survey

Buffer distance

---

Buffer distances (in miles) extend from the perimeter of park or trail units. For trails, the buffer distance is effectively a radius. For example, a one-mile buffer on each side of a trail would mean a two-mile diameter path centered on the trail.

library(tidyverse)
library(sf)

park <- regionalparks.acs::park_trail_geog_LONG[c(15),0] %>%
  st_transform(3857)
buf025 <- park  %>%
  st_buffer(dist = 1609.34 * .25)
buf05 <- park  %>%
  st_buffer(dist = 1609.34 * .5)

trail <- regionalparks.acs::park_trail_geog_LONG[c(109),0] %>%
  st_transform(3857)
tbuf025 <- trail  %>%
  st_buffer(dist = 1609.34 * .25)
tbuf05 <- trail  %>%
  st_buffer(dist = 1609.34 * .5)

Example of two different buffer distances (dark grey, light grey) around a park polygon (green):

parkbuffer = ggplot() +
  geom_sf(data = buf05, fill = "grey90") +
  geom_sf(data = buf025, fill = "grey70") +
  geom_sf(data = park, fill = "#78A22F") +
  theme_void()
# parkbuffer

Example of two different buffer distances (dark grey, light grey) around a trail segment (green):

trailbuffer = ggplot() +
  geom_sf(data = tbuf05, fill = "grey90") +
  geom_sf(data = tbuf025, fill = "grey70") +
  geom_sf(data = trail, color = "#78A22F", size=4) +
  theme_void()
# trailbuffer

Metropolitan-Council/regionalparks.acs documentation built on Feb. 20, 2022, 2:10 p.m.