Extract all osm_multilines from an osmdata object
id must be of an osm_points or osm_lines object (and can
not be the id of an osm_polygons object because multilines by
definition contain no polygons. osm_multilines returns any multiline
object(s) which contain the object specified by id.
osm_multilines(dat, id)
dat |
An object of class osmdata |
id |
OSM identification of one of more objects for which multilines are to be extracted |
An sf Simple Features Collection of multilines
Other search:
osm_lines(),
osm_multipolygons(),
osm_points(),
osm_polygons()
## Not run:
dat <- opq ("London UK") %>%
add_osm_feature (key = "name", value = "Thames", exact = FALSE) %>%
osmdata_sf ()
# Get ids of lines called "The Thames":
id <- rownames (dat$osm_lines [which (dat$osm_lines$name == "The Thames"), ])
# and find all multilinestring objects which include those lines:
osm_multilines (dat, id)
# Now note that
nrow (dat$osm_multilines) # = 24 multiline objects
nrow (osm_multilines (dat, id)) # = 1 - the recursive search selects the
# single multiline containing "The Thames"
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.