lineSlice

Takes a line , a start Point , and a stop point and returns a subsection of the line in-between those points. The start & stop points don't need to fall exactly on the line.
获取一条线、起点和终点，并返回这些点之间的线段。起止点不需要正好落在直线上。

参数

参数	类型	描述
startPt	Coord	开始点
stopPt	Coord	stopping point
line	(Feature <LineString>|LineString)	line to slice

返回

Feature <LineString> - sliced line

示例

var line = turf.lineString([
    [-77.031669, 38.878605],
    [-77.029609, 38.881946],
    [-77.020339, 38.884084],
    [-77.025661, 38.885821],
    [-77.021884, 38.889563],
    [-77.019824, 38.892368]
]);
var start = turf.point([-77.029609, 38.881946]);
var stop = turf.point([-77.021884, 38.889563]);

var sliced = turf.lineSlice(start, stop, line);