Takes a FeatureCollection of points with known value, a power parameter, a cell depth, a unit of measurement and returns a FeatureCollection of polygons in a square-grid with an interpolated value property "IDW" for each grid cell. It finds application when in need of creating a continuous surface (i.e. rainfall, temperature, chemical dispersion surface...) from a set of spatially scattered points.
Parameters
controlPoints FeatureCollection<Point> Sampled points with known valuevalueField string GeoJSON field containing the known value to interpolate onb number Exponent regulating the distance-decay weightingcellWidth number The distance across each cellunits [string] used in calculating cellSize, can be degrees, radians, miles, or kilometers (optional, default kilometers)Returns FeatureCollection<Polygon> grid A grid of polygons with a property field "IDW"
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/idw
Or install the Turf module that includes it as a function:
$ npm install @turf/turf
FAQs
turf idw module
We found that @turf/idw demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 4 open source maintainers collaborating on the project.
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