ol-ext Class: IDW

Class: IDW

ol .source. IDW

Inverse distance weighting interpolated source - Shepard's method

Name Type Argument Description

options

Name	Type	Argument	Default	Description
`source`	ol.source.vector			a source to interpolate
`getColor`	function	<optional>		a function that takes a value and returns a color (as an Array [r,g,b,a])
`useWorker`	boolean	<optional>	false	use worker to calculate the distance map (may cause flickering on small data sets). Source will fire drawstart, drawend while calculating
`lib`	Object	<optional>		Functions that will be made available to operations run in a worker
`scale`	number	<optional>	4	scale factor, use large factor to enhance performances (but minor accuracy)
`weight`	string \| function			The feature attribute to use for the weight or a function that returns a weight from a feature. Weight values should range from 0 to 100. Default use the weight attribute of the feature.

See:

computeImage(e)

Compute image data

Name	Type	Description
`e`	Object

getColor(v)

Get color for a value. Return an array of RGBA values.

Name	Type	Description
`v`	number	value

getSource()

Get the source

getValue(v, data, i, coord)

Apply the value to the map RGB. Overwrite this function to set your own colors.