shapely.linestrings

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shapely.linestrings#

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

Create an array of linestrings.

This function will raise an exception if a linestring contains less than two points.

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.

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

>>> linestrings([[[0, 1], [4, 5]], [[2, 3], [5, 6]]]).tolist()
[<LINESTRING (0 1, 4 5)>, <LINESTRING (2 3, 5 6)>]
>>> linestrings([[0, 1], [4, 5], [2, 3], [5, 6], [7, 8]], indices=[0, 0, 1, 1, 1]).tolist()
[<LINESTRING (0 1, 4 5)>, <LINESTRING (2 3, 5 6, 7 8)>]
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