geojson-data-generator

Table Of Contents

• Instruction
• Installation
• Usage

Instruction

geojson-data-generator is a NodeJS module to generate a number of geojson coordinates for mapbox around a given coordinate (x,y) within a given area, using gaussian/random density model

+ output
{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          24.833647854838226,
          60.17639419837406
        ]
      },
      "properties": {
        "id": "6.1.62"
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          24.833647756069755,
          60.176395260470244
        ]
      },
      "properties": {
        "id": "6.1.62"
      }
    },
    {
      "type": "Feature",
      "geometry": {
        "type": "Point",
        "coordinates": [
          24.833647810522173,
          60.17639448821621
        ]
      },
      "properties": {
        "id": "6.1.62"
      }
    }
  ]
}

### Installation
npm install geojson-data-generator --save

### Usage

+ generate a given number of points using gaussin model inside a polygon
const gGen = require('geojson-data-generator')


const p = [
    24.833672907989637,
    60.17639785336124
]

const area = [
    {
        'lng': 24.83309637450816,
        'lat': 60.176830883962225
    },
    {
        'lng': 24.833274734157925,
        'lat': 60.17686561495873
    },
    {
        'lng': 24.833331075196043,
        'lat': 60.176795382134316
    },
    {
        'lng': 24.833379271662295,
        'lat': 60.17680418718882
    },
    {
        'lng': 24.833404517424924,
        'lat': 60.17677336949251
    },
    {
        'lng': 24.833441894267708,
        'lat': 60.17678005482037
    },
    {
        'lng': 24.83378216483419,
        'lat': 60.17635501829898
    },
    {
        'lng': 24.833747537279038,
        'lat': 60.176346567062296
    },
    {
        'lng': 24.833771263567513,
        'lat': 60.1763157917749
    },
    {
        'lng': 24.833724227387364,
        'lat': 60.176306155487936
    },
    {
        'lng': 24.833782076292238,
        'lat': 60.17623444647833
    },
    {
        'lng': 24.833603982999193,
        'lat': 60.17620080418433
    },
    {
        'lng': 24.83309637450816,
        'lat': 60.176830883962225
    }
]

const model = gGen.densityModels.buildRandomModelPolygon(area, p[0], p[1])
const dp = gGen.genCoordsWithinPolygon(area, p[0], p[1], 50, model)

+ generate a given number of points using random model inside a circle

const gGen = require('geojson-data-generator')

const lng = 24.833217957291396, lat = 60.17680612107915
const circle = {}
circle.x = lng
circle.y = lat
circle.radius = 0.0005
const model = gGen.densityModels.buildRandomModelCircle(circle)
const p = utils.genDataPointInsideCircle(circle, lng, lat, model)