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turf-isobands
turf isobands module
Last updated 6 years ago by morganherlocker .
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turf-isobands

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turf isobands module

turf.isobands(points, z, resolution, breaks)

Takes a FeatureCollection of points with z values and an array of value breaks and generates filled contour isobands. These are commonly used to create elevation maps, but can be used for general data interpolation as well.

Parameters

parameter type description
points FeatureCollection
z string - a property name from which z values will be pulled
resolution number - resolution of the underlying grid
breaks Array.<number> - where to draw contours

Example

// create random points with random
// z-values in their properties
var points = turf.random('point', 100, {
  bbox: [0, 30, 20, 50]
});
for (var i = 0; i < points.features.length; i++) {
  points.features[i].properties.z = Math.random() * 10;
}
var breaks = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
var isolined = turf.isobands(points, 'z', 15, breaks);
//=isolined

Returns FeatureCollection, isolines

Installation

Requires nodejs.

$ npm install turf-isobands

Tests

$ npm test

Current Tags

  • 1.0.4                                ...           latest (6 years ago)

11 Versions

  • 1.0.4                                ...           6 years ago
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  • 1.0.2                                ...           6 years ago
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  • 0.0.3                                ...           7 years ago
  • 0.0.2                                ...           7 years ago
  • 0.0.1                                ...           7 years ago
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