| as_sp {osmar} | R Documentation |
Convert an osmar object to a sp object.
as_sp(obj, what = c("points", "lines", "polygons"),
crs = osm_crs(), simplify = TRUE)
obj |
An |
what |
A string describing the sp-object; see Details section |
crs |
A valid |
simplify |
Should the result list be simplified to one element if possible? |
Depending on the strings given in what the
osmar object will be converted into in a
list of objects given by the sp-package:
what = "points"the object will be
converted in a SpatialPointsDataFrame.
The data slot is filled with the attrs slot of
obj$nodes.
what = "lines"the object will be converted
in a SpatialLinesDataFrame. It is build
with all possible elements which are in obj$ways
obj$relations. The data slot is filled with
elements of both.
what = "polygons"the object will be
converted in a
SpatialPolygonsDataFrame. It consists
of elements which are in obj$ways slot.
Every conversion needs at least a non-empty
obj$nodes$attrs-slot because spatial information
are stored in there.
A list of one or more sp objects; see Details section.
data("muc", package = "osmar")
muc_points <- as_sp(muc, "points")
muc_lines <- as_sp(muc, "lines")
muc_polygons <- as_sp(muc, "polygons")
bbox(muc_points)