KBE3D / KBCore / turf / tin

函数: tin()

tin(points: FeatureCollection<Point, any>, z?: string): FeatureCollection<Polygon>

Function

Takes a set of points and creates a Triangulated Irregular Network

, or a TIN for short, returned as a collection of Polygons. These are often used for developing elevation contour maps or stepped heat visualizations.

If an optional z-value property is provided then it is added as properties called a, b, and c representing its value at each of the points that represent the corners of the triangle.

参数

points

FeatureCollection<Point, any>

input points

z?

string

name of the property from which to pull z values This is optional: if not given, then there will be no extra data added to the derived triangles.

返回

FeatureCollection<Polygon>

TIN output

示例

// generate some random point data
var points = turf.randomPoint(30, {bbox: [50, 30, 70, 50]});

// add a random property to each point between 0 and 9
for (var i = 0; i < points.features.length; i++) {
  points.features[i].properties.z = ~~(Math.random() * 9);
}
var tin = turf.tin(points, 'z');

//addToMap
var addToMap = [tin, points]
for (var i = 0; i < tin.features.length; i++) {
  var properties  = tin.features[i].properties;
  properties.fill = '#' + properties.a + properties.b + properties.c;
}