boundingbox

bounding-box

Implements bounding boxes with usual functions like intersects. Can convert from/to Leaflet bounds and GeoJSON.

API

Constructor: new BoundingBox(data)

Creates a bounding box object.

Data can be one of the following:

• Min/max coordinates: { minlat: 48.123, minlon: 16.23, maxlat: 49.012, maxlon: 16.367 }
• Lat/lon coordinates: { lat: 48.5, lon: 16.5 }
• A BoundingBox object to create a copy
• A L.latLngBounds object (using Leaflet)
• A L.latLng object (using Leaflet)

Example:

var bbox = new BoundingBox({ minlat: 48.123, minlon: 16.23, maxlat: 49.012, maxlon: 16.367 })

Method intersects(bounds)

Checks whether the bounding box 'bounds' intersects (shares any portion of space) the current object.

Example:

var bbox = new BoundingBox({ minlat: 48.123, minlon: 16.23, maxlat: 49.012, maxlon: 16.367 })
var bbox2 = new BoundingBox({ lat: 48.5, lon: 16.5 })
console.log(bbox.intersects(bbox2)) // true

Method toBBoxString()

Returns a string with the bounding box coordinates in a 'sw_lon,sw_lat,ne_lon,ne_lat' format. Useful for sending requests to web services that return geo data.

var bbox = new BoundingBox({ minlat: 48.123, minlon: 16.23, maxlat: 49.012, maxlon: 16.367 })
console.log(bbox.toBBoxString()) // '16.23,48.123,16.367,49.012'

Method diagonalLength()

Returns the length of the diagonal of the bounding box.

var bbox = new BoundingBox({ minlat: 48.123, minlon: 16.23, maxlat: 49.012, maxlon: 16.367 })
console.log(bbox.diagonalLength()) // 0.8994943023721748

Method getCenter()

Returns the center point of the bounding box.

var bbox = new BoundingBox({ minlat: 48.123, minlon: 16.23, maxlat: 49.012, maxlon: 16.367 })
console.log(bbox.getCenter()) // { lat: 48.567499999999995, lon: 16.2985 }

Method toLeaflet()

Returns the bounding box as L.latLngBounds object

Method toTile()

(This function is still work in progress)

Fit the bounding box into tiles

Tests

To run tests with nodejs, just call ./run_tests

To run tests in a browser, call ./run_tests first, which will create all_tests.js and then open the file test.html in your favorite browser.