@turf/tin is a module of the Turf.js library that allows you to create a Triangulated Irregular Network (TIN) from a set of points. TINs are used in geographic information systems (GIS) to represent a surface. This package is particularly useful for spatial analysis and geospatial data visualization.
Create TIN from Points
This feature allows you to create a TIN from a set of points. Each point can have properties such as elevation, which can be used to create the TIN. The code sample demonstrates how to create a TIN from three points with elevation properties.
const turf = require('@turf/tin');
const points = turf.featureCollection([
turf.point([0, 0], {elevation: 10}),
turf.point([10, 10], {elevation: 20}),
turf.point([20, 20], {elevation: 30})
]);
const tin = turf.tin(points, 'elevation');
console.log(JSON.stringify(tin));d3-delaunay is a D3 module that provides fast algorithms for computing Delaunay triangulations and Voronoi diagrams. It is similar to @turf/tin in that it can be used to create triangulated networks from a set of points. However, d3-delaunay is more focused on performance and is often used in data visualization contexts.
earcut is a fast, robust polygon triangulation library. While it is not specifically designed for geospatial data, it can be used to triangulate polygons, which is a similar operation to creating a TIN. earcut is known for its speed and simplicity.
triangulate is a simple library for triangulating 2D polygons. It is similar to @turf/tin in that it can be used to create a network of triangles from a set of points. However, it is more general-purpose and not specifically designed for geospatial applications.
Takes a set of points and the name of a z-value property 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.
This triangulates the points, as well as adds properties called a, b,
and c representing the value of the given propertyName at each of
the points that represent the corners of the triangle.
Parameters
points FeatureCollection<Point> input pointsz [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.Examples
// generate some random point data
var points = turf.random('points', 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;
}
Returns FeatureCollection<Polygon> TIN output
This module is part of the Turfjs project, an open source module collection dedicated to geographic algorithms. It is maintained in the Turfjs/turf repository, where you can create PRs and issues.
Install this module individually:
$ npm install @turf/tin
Or install the Turf module that includes it as a function:
$ npm install @turf/turf
4.3.0
@turf/polygon-tangents Finds the tangents of a (Multi)Polygon from a Point. (https://github.com/Turfjs/turf/pull/708)@turf/rewind Rewind LineString or Polygon outer ring ~clockwise~ counter-clockwise and inner rings ~counterclockwise~ clockwise (https://github.com/Turfjs/turf/pull/700 & https://github.com/Turfjs/turf/issues/66)@turf/isobands - Takes a grid FeatureCollection of Point features with z-values and an array of value breaks and generates filled contour isobands. (https://github.com/Turfjs/turf/pull/619)@turf/helpers (https://github.com/Turfjs/turf/pull/732)@turf/inside (https://github.com/Turfjs/turf/pull/706)@turf/meta. (https://github.com/Turfjs/turf/pull/712 & https://github.com/Turfjs/turf/issues/692)getGeom & getGeomType in @turf/invariant (https://github.com/Turfjs/turf/pull/720)round(), radians2degrees() and degrees2radians() to turf-helpers
(https://github.com/Turfjs/turf/pull/715)@turf/rewind (https://github.com/Turfjs/turf/pull/741)@turf/circle translate properties (https://github.com/Turfjs/turf/pull/717)@turf/buffer to polygons (https://github.com/Turfjs/turf/issues/660 & https://github.com/Turfjs/turf/pull/718)@turf/difference (https://github.com/Turfjs/turf/pull/725)@turf/line-intersect (https://github.com/Turfjs/turf/pull/731)@turf/line-chunk (https://github.com/Turfjs/turf/pull/726)@turf/line-segment (https://github.com/Turfjs/turf/pull/727 & https://github.com/Turfjs/turf/pull/711)@turf/line-overlap (https://github.com/Turfjs/turf/pull/711)@turf/rewind (https://github.com/Turfjs/turf/pull/741)@turf/buffer (https://github.com/Turfjs/turf/pull/739)radius to @turf/buffer (https://github.com/Turfjs/turf/pull/736)FAQs
turf tin module
The npm package @turf/tin receives a total of 376,613 weekly downloads. As such, @turf/tin popularity was classified as popular.
We found that @turf/tin demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 0 open source maintainers collaborating on the project.
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