as_sp: Convert osmar object to sp object
In gergness/osmar2: OpenStreetMap and R

Description Usage Arguments Details Value Examples

Convert an osmar object to a sp object.

1 2	as_sp(obj, what = c("points", "lines", "polygons"), crs = osm_crs(), simplify = TRUE)

`obj`	An `osmar` object
`what`	A string describing the sp-object; see Details section
`crs`	A valid `CRS` object; default value is given by `osm_crs`-function
`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 = "osmar2")
  muc_points <- as_sp(muc, "points")
  muc_lines <- as_sp(muc, "lines")
  muc_polygons <- as_sp(muc, "polygons")

  bbox(muc_points)