geo_buffer: Perform a buffer operation on a temporary projected CRS

In stplanr: Sustainable Transport Planning

Perform a buffer operation on a temporary projected CRS

Description

This function solves the problem that buffers will not be circular when used on non-projected data.

Usage

geo_buffer(shp, dist = NULL, width = NULL, ...)

Arguments

shp	A spatial object with a geographic CRS (e.g. WGS84) around which a buffer should be drawn
dist	The distance (in metres) of the buffer (when buffering simple features)
width	The distance (in metres) of the buffer (when buffering sp objects)
...	Arguments passed to the buffer (see ?sf::st_buffer for details)

Details

Requires recent version of PROJ (>= 6.3.0). Buffers on sf objects with geographic (lon/lat) coordinates can also be done with the s2 package.

See Also

Other geo: bbox_scale(), bind_sf(), geo_bb_matrix(), geo_bb(), geo_length(), geo_projected(), geo_select_aeq(), quadrant()

Examples

lib_versions <- sf::sf_extSoftVersion()
lib_versions
if (lib_versions[3] >= "6.3.1") {
  buff_sf <- geo_buffer(routes_fast_sf, dist = 50)
  plot(buff_sf$geometry)
  geo_buffer(routes_fast_sf$geometry, dist = 50)
}

stplanr documentation built on Sept. 15, 2023, 9:07 a.m.