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turf-deviation
Advanced tools
Calculates the standard deviation value of a field for points within a set of polygons.
###Install
npm install turf-deviation
###Parameters
name | description |
---|---|
polyFC | a FeatureCollection of polygons |
pointFC | a FeatureCollection of points |
inField | field from pointFC to aggregate |
outField | field to append to polyFC representing deviation |
###Usage
deviation(polyFC, ptFC, inField, outField)
###Example
var deviation = require('turf-deviation')
var point = require('turf-point')
var polygon = require('turf-polygon')
var featurecollection = require('turf-featurecollection')
var poly1 = polygon([[[0,0],[10,0],[10,10], [0,10]]])
var poly2 = polygon([[[10,0],[20,10],[20,20], [20,0]]])
var polyFC = featurecollection([poly1, poly2])
var pt1 = point(1,1, {population: 500})
var pt2 = point(1,3, {population: 400})
var pt3 = point(14,2, {population: 600})
var pt4 = point(13,1, {population: 500})
var pt5 = point(19,7, {population: 200})
var ptFC = featurecollection([pt1, pt2, pt3, pt4, pt5])
var inField = 'population'
var outField = 'pop_deviation'
var deviated = deviation(polyFC, ptFC, inField, outField)
console.log(deviated.features[0].properties.pop_deviation)
console.log(deviated.features[1].properties.pop_deviation)
FAQs
turf deviation module
The npm package turf-deviation receives a total of 20 weekly downloads. As such, turf-deviation popularity was classified as not popular.
We found that turf-deviation demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 8 open source maintainers collaborating on the project.
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