turf-pointgriddensity

This is a copy of https://github.com/Turfjs/turf/tree/master/packages/turf-point-grid, with additional features. I will attemp to make a PR soon.

@turf/point-grid

pointGrid

Creates a Point grid from a bounding box, FeatureCollection or Feature.

Parameters

• bbox Array<number> extent in [minX, minY, maxX, maxY] order
• cellSide number the distance between points, in units
• options Object Optional parameters (optional, default {})
  • options.units string used in calculating cellSide, can be degrees, radians, miles, or kilometers (optional, default 'kilometers')
  • options.mask Feature<(Polygon | MultiPolygon)>? if passed a Polygon or MultiPolygon, the grid Points will be created only inside it
  • options.properties Object passed to each point of the grid (optional, default {})
  • options.spacings Object Object of {latSpacing, lngSpacing} indicating width and height between cells (optional, default {})
  • options.rotation Object The Decimal Degree Value to rotate the resulting features in counter-clockwise. (optional, default 0)

Examples

var extent = [-70.823364, -33.553984, -70.473175, -33.302986];
var cellSide = 3;
var options = {units: 'miles'};
 
var grid = turf.pointGrid(extent, cellSide, options);
 
//addToMap
var addToMap = [grid];

Returns FeatureCollection<Point> grid of points

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This module is part of the Turfjs project, an open source module collection dedicated to geographic algorithms. It is maintained in the Turfjs/turf repository, where you can create PRs and issues.

Installation

Install this module individually:

 
$ npm install turf-pointgriddensity 
 

Testing:

  npm install --dev jest 
  npm install babel-preset-env
  npm test

What I changed:

Set custom lat-lng spacing between cells. Originally, we passed 1 value for both lat and lng.

Set rotation, so that we can rotate points.

note: the example is passing a polygon mask.