概念
（1）Piecewise linear complex (PLC) 分段线性复合形
（2）Cell complex 单元复形 [1] （胞腔复形？ 元胞复形）
that is a union of non-intersecting cells. Here, by a 
-dimensional cell one means a topological space that is homeomorphic to the interior of the unit cube of dimension 
. If for each 
-dimensional cell 
of 
one is given a continuous mapping 
from the 
-dimensional cube 
into 
such that: 1) the restriction 
of 
to the interior 
of 
is one-to-one and the image 
is the closure 
in 
of 
(here 
is a homeomorphism of 
onto 
); and 2) the set 
, where 
is the boundary of 
, is contained in the union 
of the cells 
of 
, then 
is called a cell complex; the union 
is called the skeleton of dimension 
of the cell complex 
. An example of a cell complex is a simplicial polyhedron.A subset 
of a cell complex 
is called a subcomplex if it is a union of cells of 
containing the closures of such cells. Thus, the 
-dimensional skeleton 
of 
is a subcomplex of 
. Any union and any intersection of subcomplexes of 
are subcomplexes of 
.
Any topological space can be regarded as a cell complex — as the union of its points, which are cells of dimension 0. This example shows that the notion of a cell complex is too broad; therefore narrower classes of cell complexes are important in applications, for example the class of cellular decompositions or CW-complexes (cf. CW-complex).
https://www.encyclopediaofmath.org/index.php/Cell_complex
（3）Linear Cell Complex 线性单元复形 （参考）
给定一组平面曲线（planar curves）, arrangement是将平面分解subdivision of the plane为0维zero-dimensional, 一维（线）one-dimensional 二维（面）单元 two-dimensional cells, 称作节点vertices、边 edges和面元 faces
CGAL CGAL中，2D Arrangements学习笔记 http://www.cnblogs.com/lihao102/archive/2013/04/14/3020238.html
技巧：
生成一个Cell complex之后，用ArcGIS相交Intersect工具，利用范围裁剪。