https://github.com/stebogit/grid-to-matrix

Takes a pointGrid and returns a correspondent matrix of the 'property' values
https://github.com/stebogit/grid-to-matrix

geojson grid matrix points turfjs

Last synced: about 1 year ago
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Takes a pointGrid and returns a correspondent matrix of the 'property' values

• Host: GitHub
• URL: https://github.com/stebogit/grid-to-matrix
• Owner: stebogit
• License: mit
• Created: 2017-04-14T04:43:12.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2017-10-07T06:30:16.000Z (over 8 years ago)
• Last Synced: 2025-03-26T17:47:17.785Z (about 1 year ago)
• Topics: geojson, grid, matrix, points, turfjs
• Language: JavaScript
• Size: 97.7 KB
• Stars: 2
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# grid-to-matrix

[![Build Status](https://travis-ci.org/stebogit/grid-to-matrix.svg?branch=master)](https://travis-ci.org/stebogit/grid-to-matrix)

[![npm version](https://badge.fury.io/js/grid-to-matrix.svg)](https://badge.fury.io/js/grid-to-matrix)

[![MIT licensed](https://img.shields.io/badge/license-MIT-blue.svg)](https://github.com/stebogit/grid-to-matrix/blob/master/LICENSE)

Takes a [Point](http://geojson.org/geojson-spec.html#point) grid and returns a correspondent matrix of the `property` values

**Parameters**

- `grid` \[**[FeatureCollection](http://geojson.org/geojson-spec.html#feature-collection-objects)<[Point](http://geojson.org/geojson-spec.html#point)>**] grid of points

- `options.zProperty` \[**[string](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String)**] the property name in `grid` from which the matrix values will be pulled (optional, default `elevation`)

- `options.flip` \[**[boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)**] returns the matrix upside-down (optional, default `false`)

- `options.flags` \[**[boolean](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Boolean)**] , adding a `matrixPosition` array field ([`row`, `column`]) to its properties, the grid points with coordinates on the matrix (optional, default `false`)

**Returns**

Matrix \[**[Array](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)>**] of the `grid` points `property` values

### Installation

**npm**

```sh

$ npm install grid-to-matrix

```

**browser (ES5)**

```html

```

### Quickstart

```javascript

  var pointGrid = require('@turf/point-grid');

  var gridToMatrix = require('grid-to-matrix');

  var extent = [-70.823364, -33.553984, -70.473175, -33.302986];

  var cellSize = 3;

  var grid = pointGrid(extent, cellSize);

  // add a random elevation property to each point between 0 and 60

  for (var i = 0; i < grid.features.length; i++) {

    grid.features[i].properties.elevation = (Math.random() * 60);

  }

  gridToMatrix(grid);

  // =[

  //    [ 1, 13, 20,  9, 10, 13, 18],

  //    [34,  8,  0,  4,  5,  8, 13],

  //    [10,  5,  2,  1,  2,  5, 24],

  //    [ 0,  4, 56, 19,  0,  4,  9],

  //    [10,  5,  2, 12,  2,  5, 10],

  //    [57,  8,  5,  4,  5,  0, 57],

  //    [ 3, 13,  0,  9,  5, 13, 35],

  //    [18, 13, 10,  9, 78, 13, 18]

  //  ]

```