Leaflet.draw.topology
Topology editing extension to Leaflet.draw. Video demo can be found on YouTube.
Getting started
The plugin can be initialized as so:
L.Edit.Topology.init(map, layer, options);
Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
| map | L.map | true | The map being used |
| layer | LayerGroup, FeatureGroup, or GeoJson | true | The layer for which the topological relationships should be preserved |
| options | L.icon | false | Object with one key - icon. Used for defining a custom drag handle for editing. |
Example map
// Initialize a map
var map = new L.map("map").setView([38.5, -105], 6);
// Add a tile layer
L.tileLayer('http://{s}.acetate.geoiq.com/tiles/acetate/{z}/{x}/{y}.png', {
maxZoom: 18,
attribution: ' ©2012 Esri & Stamen, Data from OSM and Natural Earth'
}).addTo(map);
// Load a GeoJSON file
$.getJSON("data.geojson", function(data) {
// Create, style, and add a GeoJson layer
var geojson = L.geoJson(data, {
style: {
fillColor: '#777',
color: '#444',
weight: 3,
opacity: 0.8
}
}).addTo(map);
// Enable topology editing on the GeoJSON layer and use a custom marker
L.Edit.Topology.init(map, geojson, {
"icon": new L.Icon({
iconUrl: '../src/icons/marker_blk.svg',
iconSize: [12, 12]
})
});
});
Dependencies
Example
Demo can be found in the test folder.
Development
git clone https://github.com/jczaplew/Leaflet.draw.topology.git
cd Leaflet.draw.topology
npm install
git clone https://github.com/makinacorpus/Leaflet.Snap node_modules/Leaflet.Snap
To validate and minify the JavaScript and CSS, run grunt
License
All code unique to this plugin uses a CC0 1.0 Public Domain Dedication. It would be nice if you cited the author(s), but it is not necessary. Leaflet.draw and Leaflet.Snap are used under an MIT License, and Leaflet.GeometryUtil is used under a BSD License.