charto-leaflet

Provides useful classes for Leaflet.

Projection

Like Leaflet's L.Projection.LonLat but without hard-coded bounds. Pass an L.Bounds object to the constructor instead.

CRS

Simple coordinate reference system making Leaflet internally use the same coordinates as the original data. Constructor arguments:

• Coordinate reference system name string, like EPSG:3067. For information only, not used for anything.
• Any Leaflet projection, preferably an instance of Projection from this package.
• Optionally an L.Transformation instance for mapping between external spatial and internal pixel coordinates. By default, latitude is flipped.

Usage

import { Projection, CRS } from 'charto-leaflet';
import * as L from 'leaflet';

const JHS180 = new CRS(
	'EPSG:3067',
	new Projection(L.bounds([ -548576, 6291456 ], [ 1548576, 8388608 ]))
);

const map = L.map(document.body, {
	crs: JHS180
});

License

The MIT License

Copyright (c) 2017 BusFaster Ltd