python - 如何从两个点数组创建 Shapely LineString

Question

我正在尝试创建两个数组的单个 LineString 对象。我已经尝试了多种方法，但我不断得到:

>>> array = [(0,0),(1,0),(2,0),(3,0)][(1,3),(1.4,2),(2,0)]

类型错误:列表索引必须是整数，而不是元组

##      A
##       \
##        \
##         X
##          \
##           \
## B-----C-----D-----F

## Test to Identify Junctions - Shared points where two or more lines intersect

def test_find_junctions(self):
    g = PreserveTopology()
    # LINE BCDF, AXD
    array = [(0,0),(1,0),(2,0),(3,0)][(1,3),(1.4,2),(2,0)]
    # LINE AXD
    #array2 = [(1,3),(1.4,2),(2,0)]
    array_as_linestring = LineString(array)
    #array2_as_linestring = LineString(array2)
    result = g.find_junctions_line(array_as_linestring)
    assert_equal(result,(2,0))

Answer 1

看起来您有两条线段，因此您需要具有 LineString 几何图形列表或 MultiLineString 几何图形。继续@David 修复语法错误，您可以构建以下结构之一:

from shapely.geometry import LineString, MultiLineString
from shapely.ops import cascaded_union

array = [[(0, 0), (1, 0), (2, 0), (3, 0)], [(1, 3), (1.4, 2), (2, 0)]]

ls = [LineString(ar) for ar in array]
mls = MultiLineString(array)