shapely.linearrings

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shapely.linearrings#

linearrings(coords, y=None, z=None, indices=None, out=None, **kwargs)#

Create an array of linearrings.

If the provided coords do not constitute a closed linestring, or if there are only 3 provided coords, the first coordinate is duplicated at the end to close the ring. This function will raise an exception if a linearring contains less than three points or if the terminal coordinates contain NaN (not-a-number).

Parameters:
coordsarray_like

An array of lists of coordinate tuples (2- or 3-dimensional) or, if y is provided, an array of lists of x coordinates

yarray_like, optional
zarray_like, optional
indicesarray_like, optional

Indices into the target array where input coordinates belong. If provided, the coords should be 2D with shape (N, 2) or (N, 3) and indices should be an array of shape (N,) with integers in increasing order. Missing indices result in a ValueError unless out is provided, in which case the original value in out is kept.

outndarray, optional

An array (with dtype object) to output the geometries into.

**kwargs

See NumPy ufunc docs for other keyword arguments. Ignored if indices is provided.

See also

linestrings

Notes

  • Usage of the y and z arguments will prevents lazy evaluation in dask. Instead provide the coordinates as a (..., 2) or (..., 3) array using only coords.

Examples

>>> linearrings([[0, 0], [0, 1], [1, 1], [0, 0]])
<LINEARRING (0 0, 0 1, 1 1, 0 0)>
>>> linearrings([[0, 0], [0, 1], [1, 1]])
<LINEARRING (0 0, 0 1, 1 1, 0 0)>
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