R: Convert osmar object to sp object

as_sp {osmar} | R Documentation

## Convert osmar object to sp object

### Description

Convert an osmar object to a sp object.

### Usage

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

### Arguments

`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?

### Details

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.

### Value

A list of one or more sp objects; see Details section.

### Examples

    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)

[Package osmar version 1.1-7 Index]