osmdata (version 0.3.0)

osm_poly2line: Convert osmdata polygons into lines

Description

Street networks downloaded with add_osm_object(key = "highway") will store any circular highways in osm_polygons. this function combines those with the osm_lines component to yield a single sf data.frame of all highways, whether polygonal or not.

Usage

osm_poly2line(osmdat)

Value

Modified version of same object with all osm_polygons

objects merged into osm_lines.

Arguments

osmdat

An osmdata_sf object.

See Also

Other transform: osm_elevation(), trim_osmdata(), unique_osmdata(), unname_osmdata_sf()

Examples

if (FALSE) {
query <- opq ("colchester uk") |>
    add_osm_feature (key = "highway")
# Then extract data from 'Overpass' API
dat <- osmdata_sf (query)
# colchester has lots of roundabouts, and these are stored in 'osm_polygons'
# rather than 'osm_lines'. The former can be merged with the latter by:
dat2 <- osm_poly2line (dat)
}
# 'dat2' will have more lines than 'dat', but the same number of polygons
# (they are left unchanged.)