random-points-generator

Generates n random points based on @turf/random.

The value added regarding @turf/random is the filter. Indeed, here points can be generated inside a GeoJSON polygon.

And it comes with :

• a command line tool,
• a node library,
• a browser library

Prerequisites

• node

Usage

node

$ npm i random-points-generator

or

yarn add random-points-generator

browser

<script src="https://unpkg.com/random-points-generator"></script>

<script>
  const fc = geotools.random(5);
</script>

API

function random (number, options)

| Name | Description | Type | Default | | --------- | ---------------------------- | ------- | --------- | | number | number of points to generate | Integer | 10 | | options | random options | Object | undefined |

returns a FeatureCollection

options

| Options | Description | | ---------- | ----------------------------------------------------------------------------------------------------------------------------- | | bbox | Array extent in [ minX, minY, maxX, maxY ] order which means (southwest lng, lat northeast lng,lat) | | features | GeoJSON polygons as features or a FeatureCollection | | unkink | true\|false [Default is true] Unkink Polygon (see) before processing the features |

Example

const RandomGenerator = require('random-points-generator');
const points = RandomGenerator.random(3);
console.log(JSON.stringify(points));

will output something like :

{"type":"FeatureCollection","features":[{"type":"Feature","geometry":{"type":"Point","coordinates":[126.41316810428155,-47.548372609587574]},"properties":{}},{"type":"Feature","geometry":{"type":"Point","coordinates":[97.69989737806617,-47.200575920302434]},"properties":{}},{"type":"Feature","geometry":{"type":"Point","coordinates":[24.264802630637277,72.69680002654108]},"properties":{}}]}

From the command line

• clone or fork the repo
• cd random-points-generator
• run npm install
• run ./bin/random-points-generator --help to get options

Usage: bin/random-points-generator [options]

Options:
  --help, -h     Show help                                             [boolean]
  --number, -n                                                     [default: 10]
  --verbose, -v                                                 [default: false]

Examples:
  bin/random-points-generator               Generates 10 random coordinates,
                                            output to console in GeoJSON format
  bin/random-points-generator -n 1000       Generates 1000 random coordinates
  --xmin=-2 --xmax=4 --ymin=-45 --ymax=50   with these bounding box
  bin/random-points-generator -i            Generates 10 random coordinates
  world_countries.geojson                   within polygons from file
                                            world_countries.geojson

Converting to csv

CSV files are not dead. So if needed here is a simple example to generate csv files.

$ npm install random-points-generator
$ npm install geojson2csv

$ ./node_modules/.bin/random-points-generator > points.geojson

$ node

const geojson2csv = require('geojson2csv');

geojson2csv('points.geojson', 'points.csv', (err) => {
  if (err) throw err;
});

:warning: geojson2csv inverts latitude and longitude regarding the column headers check issue.

Revision History

| Version | Date | Description | | -------- | ---------- | --------------------------------------- | | v1.8.0 | 26/01/2023 | Adds optional unkink polygons parameter | | v1.7.6 | 31/03/2021 | Upgrade deps packages | | v1.7.5 | 22/11/2020 | Upgrade deps packages | | v1.7.4 | 09/12/2019 | Upgrade deps packages | | v1.7.3 | 09/12/2019 | Upgrade deps packages | | v1.7.2 | 16/08/2019 | Upgrade deps packages | | v1.7.1 | 16/08/2019 | Build removes node 6 | | v1.7.0 | 14/08/2019 | Build / test on node 10 | | v1.6.1 | 10/12/2018 | Missing Built Files | | v1.6.0 | 10/12/2018 | Upgrade deps packages | | v1.5.2 | 01/05/2018 | fixes unnecessary verbose message | | v1.5.0 | 25/03/2018 | add a browser package | | v1.4.0 | 20/02/2018 | Use single turf modules | | v1.3.0 | 07/11/2017 | Unkink input polygons | | v1.2.0 | 21/05/2017 | Rewrite with es6 notation | | v1.1.0 | 25/04/2017 | Split command line and lib | | v1.0.0 | 03/10/2016 | Creation : a tool command line |

Resources

resources folder contains Large Scale Data from Natural Earth

Licensing

Licensed under the MIT License

A copy of the license is available in the repository's LICENSE file.