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turf-aggregate

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turf-aggregate

turf aggregate module

  • 0.0.2
  • Source
  • npm
  • Socket score

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32
increased by23.08%
Maintainers
1
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turf-aggregate

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Takes a set of polygons, a set of points, and an array of aggregations, then perform them. Sum, average, count, min, max, and deviation are supported.

var t = require('turf-aggregate')

var poly1 = t.polygon([[[0,0],[10,0],[10,10],[0,10]]])
var poly2 = t.polygon([[[10,0],[20,10],[20,20], [20,0]]])
var polyFC = t.featurecollection([poly1, poly2])
var pt1 = t.point(5,5, {population: 200})
var pt2 = t.point(1,3, {population: 600})
var pt3 = t.point(14,2, {population: 100})
var pt4 = t.point(13,1, {population: 200})
var pt5 = t.point(19,7, {population: 300})
var ptFC = t.featurecollection([pt1, pt2, pt3, pt4, pt5])
var aggregations = [
  {
    aggregation: 'sum',
    inField: 'population',
    outField: 'pop_sum'
  },
  {
    aggregation: 'average',
    inField: 'population',
    outField: 'pop_avg'
  },
  {
    aggregation: 'median',
    inField: 'population',
    outField: 'pop_median'
  },
  {
    aggregation: 'min',
    inField: 'population',
    outField: 'pop_min'
  },
  {
    aggregation: 'max',
    inField: 'population',
    outField: 'pop_max'
  },
  {
    aggregation: 'deviation',
    inField: 'population',
    outField: 'pop_deviation'
  },
  {
    aggregation: 'variance',
    inField: 'population',
    outField: 'pop_variance'
  },
  {
    aggregation: 'count',
    inField: '',
    outField: 'point_count'
  }
]

var polys = aggregate(polyFC, ptFC, aggregations)

 console.log(polys)

=======

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Package last updated on 29 May 2014

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