coordinates | R Documentation |

set spatial coordinates to create a Spatial object, or retrieve spatial coordinates from a Spatial object

```
coordinates(obj, ...)
coordinates(object) <- value
```

`obj` |
object deriving from class "Spatial" |

`object` |
object of class "data.frame" |

`value` |
spatial coordinates; either a matrix, list, or data
frame with numeric data, or column names, column number or a
reference: a formula (in the form of e.g. |

`...` |
additional arguments that may be used by particular methods |

usually an object of class SpatialPointsDataFrame; if the coordinates set cover the full set of variables in object, an object of class SpatialPoints is returned

```
# data.frame
data(meuse.grid)
coordinates(meuse.grid) <- ~x+y
gridded(meuse.grid) <- TRUE
class(meuse.grid)
bbox(meuse.grid)
data(meuse)
meuse.xy = meuse[c("x", "y")]
coordinates(meuse.xy) <- ~x+y
class(meuse.xy)
```

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