isobands

Takes a grid FeatureCollection of Point features with z-values and an array of value breaks and generates filled contour isobands.
取带有z值和一组值断点的点Feature的网格FeatureCollection，并生成填充的等边线。

> npm install @turf/isobands

参数

参数	类型	描述
pointGrid	FeatureCollection <Point>	input points
breaks	Array	where to draw contours
options	Object	可选参数：见下文

options选项

属性	类型	默认值	描述
zProperty	string	elevation	the property name in
commonProperties	Object	{}	GeoJSON properties passed to ALL isobands
breaksProperties	Array	[]	GeoJSON properties passed, in order, to the correspondent isoband (order defined by breaks)

返回

FeatureCollection <MultiPolygon> - a FeatureCollection of MultiPolygon features representing isobands

示例

var extent = [0, 30, 20, 50];
var cellWidth = 100;
var pointGrid = turf.pointGrid(extent, cellWidth, {units: 'miles'});

for (var i = 0; i < pointGrid.features.length; i++) {
    pointGrid.features[i].properties.temperature = Math.random() * 10;
}
var breaks = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];

var lines = turf.isobands(pointGrid, breaks, {zProperty: 'temperature'});